SLLSF57 Data sheet

SLLSF57A August 2022 – April 2024 TMDS1204

PRODUCTION DATA

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RNQ|40
- MPQF457A

Thermal pad, mechanical data (Package|Pins)

Orderable Information

7.5.1 TMDS1204 Registers

Table 7-23 lists the memory-mapped registers for the TMDS1204 registers. All register offset addresses not listed in Table 7-23 should be considered as reserved locations and the register contents should not be modified.

Table 7-23 TMDS1204 Registers

Offset	Acronym	Register Name	Section
8h	REV_ID	Revision ID	Go
9h	PD_RST	Power Down and Reset control	Go
Ah	MISC_CONTROL	Misc Control	Go
Bh	GBL_SLEW_CTRL	Global TX Slew control for data lanes in HDMI1.4 and 2.0	Go
Ch	GBL_SLEW_CTRL2	Global TX Slew control for data and clock	Go
Dh	GBL_CTRL1	Global control	Go
Eh	GBL_CTLE_CTRL	Global CTLE control	Go
11h	LANE_ENABLE	Lane enables	Go
12h	CLK_CONFIG1	CLK lane TX swing and FFE control	Go
13h	CLK_CONFIG2	CLK lane RX EQ control	Go
14h	D0_CONFIG1	D0 lane TX swing and FFE control	Go
15h	D0_CONFIG2	D0 lane RX EQ control	Go
16h	D1_CONFIG1	D1 lane TX swing and FFE control	Go
17h	D1_CONFIG2	D1 lane RX EQ control	Go
18h	D2_CONFIG1	D2 lane TX swing and FFE control	Go
19h	D2_CONFIG2	D2 lane RX EQ control	Go
1Ah	SIGDET_TH_CFG	SIGDET voltage threshold control	Go
1Ch	GBL_STATUS	Global Powerdown and Standby Status	Go
1Dh	AEQ_CONTROL1	Adaptive EQ control1	Go
1Eh	AEQ_CONTROL2	Adaptive EQ control2	Go
20h	SCDC_TMDS_CONFIG	SCDC TMDS Clock Ratio	Go
31h	SCDC_SINK_CONFIG	SCDC SNK FRL FFE and Rate
35h	SCDC_SRC_TEST	SCDC Test	Go
41h	SCDC_STATUS10	Lanes 0 and 1 FRL Training Status	Go
42h	SCDC_STATUS32	Lanes 2 and 3 FRL Training Status	Go
50h	AEQ_STATUS	Adaptive EQ Status	Go
51h	AEQ_STATUS2	Adaptive EQ Status	Go

Complex bit access types are encoded to fit into small table cells. Table 7-24 shows the codes that are used for access types in this section.

Table 7-24 TMDS1204 Access Type Codes

Access Type	Code	Description
Read Type
R	R	Read
RH	R H	Read Set or cleared by hardware
Write Type
W	W	Write
W1S	W 1S	Write 1 to set
WtoPH	W toPH	Write Pulse high
Reset or Default Value
-n		Value after reset or the default value

7.5.1.1 REV_ID Register (Offset = 8h) [Reset = 03h]

REV_ID is shown in Table 7-25.

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Table 7-25 REV_ID Register Field Descriptions

Bit	Field	Type	Reset	Description
7-0	REV_ID	RH	3h	Device revision.

7.5.1.2 PD_RST Register (Offset = 9h) [Reset = 01h]

PD_RST is shown in Table 7-26.

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Table 7-26 PD_RST Register Field Descriptions

Bit	Field	Type	Reset	Description
7	SOFT_RST	WtoPH	0h	Writing a 1 to this field resets all fields
6	SCDC_SOFT_RST	WtoPH	0h	Writing a 1 to this field resets the fields in the SCDC registers 20h, 31h, 35h, 41h and 42h.
5	RESERVED	R	0h	Reserved
4	RESERVED	R/W	0h	Reserved
3	RESERVED	R	0h	Reserved
2	HPD_PWRDWN_DISABLE	R/W	0h	Mode to ignore HPD pin and always enter active state unless PD_EN is high 0h = Automatically enter power down based on HPD_IN 1h = Always remain in active state or Standby
1	STANDBY_DISABLE	R/W	0h	When high, standby state is disabled and the device will immediately enter active state with all lanes enabled when not in power down. When low, the device will enter standby state when exiting power down and wait for incoming data before entering active state. 0h = Standby state enabled 1h = Standby state disabled
0	PD_EN	R/W	1h	I2C power down. Software should clear this field after it has completed initialization. HPD_OUT will be asserted low when this field is set. 0h = Normal operation 1h = Forced power down by I2C

7.5.1.3 MISC_CONTROL Register (Offset = Ah) [Reset = 08h]

MISC_CONTROL is shown in Table 7-27.

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Table 7-27 MISC_CONTROL Register Field Descriptions

Bit	Field	Type	Reset	Description
7	LANE_SWAP	R/W	0h	This field swaps the input and output lanes. 0h = No lanes swapped 1h = Both input and output lanes swapped
6	FANOUT_EN	R/W	0h	Selects whether or not fan-out buffer feature is enabled or not. When enabled, hardware will enable RCLKOUT when operating in HDMI1.4 and HDMI2.0. When operating in HDMI 2.1 mode, OUT_CLK will be enabled for FRL lane 3. 0h = Fan-out buffer feature disabled. 1h = Fan-out buffer feature enabled.
5	RX_TERM_DISABLE	R/W	0h	When set will disable Rx termination. 0h = Enabled when HPD_IN high. 1h = Disable
4	HPD_OUT_SEL	R/W	0h	Selects whether HPD_OUT is push/pull or open-drain. 0h = Push Pull 1h = Open Drain
3	EQ_SNOOP_CTRL	R/W	1h	Control whether Rx EQ is adjusted in response to snooped TXFFE when TXFFE snooping is enabled through registers 41h and 42h. 0h = Rx EQ automatically adjusted for TXFFE 1h = Rx EQ is fixed
2	RATE_SNOOP_CTRL	R/W	0h	Control snooping of HDMI rates. When snooping is disabled, correct HDMI rate must be written through I2C to registers 20h and 31h. 0h = Snooping enabled 1h = Snooping disabled
1-0	TXFFE_SNOOP_CTRL	R/W	0h	Control snooping of TXFFE 0h = DDC snooping through registers 35h, 41h and 42h 1h = DDC snooping disabled. TXFFE controlled through I2C writes to 35h, 41h and 42h 2h = DDC snooping disabled. TXFFE controlled through writes to CLK_TXFFE, D0_TXFFE, D1_TXFFE, and D2_TXFFE 3h = DDC snooping disabled. TXFFE controlled through writes to CLK_TXFFE, D0_TXFFE, D1_TXFFE, and D2_TXFFE

7.5.1.4 GBL_SLEW_CTRL Register (Offset = Bh) [Reset = 34h]

GBL_SLEW_CTRL is shown in Table 7-28.

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Table 7-28 GBL_SLEW_CTRL Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	SLEW_3G	R/W	3h	Field controls slew rate for HDMI 1.4 data lane and HDMI 2.1 3Gbps FRL data lanes. 0h = slowest edge rate 7h = fastest edge rate
3	RESERVED	R	0h	Reserved
2-0	SLEW_6G	R/W	4h	Field controls slew rate for HDMI 2.0 data lanes and HDMI 2.1 6Gbps FRL data lanes. 0h = slowest edge rate 7h = fastest edge rate

7.5.1.5 GBL_SLEW_CTRL2 Register (Offset = Ch) [Reset = 71h]

GBL_SLEW_CTRL2 is shown in Table 7-29.

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Table 7-29 GBL_SLEW_CTRL2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	SLEW_8G10G12G	R/W	7h	Field controls slew rate for data lanes for 8Gbps, 10Gbps and 12Gbps FRL datarates 0h = slowest edge rate 7h = fastest edge rate
3	RESERVED	R	0h	Reserved
2-0	SLEW_CLK	R/W	1h	Field control slew rate of clock lane in HDMI 1.4b and HDMI 2.0 modes. 0h = slowest edge rate 7h = fastest edge rate

7.5.1.6 GBL_CTRL1 Register (Offset = Dh) [Reset = 22h]

GBL_CTRL1 is shown in Table 7-30.

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Table 7-30 GBL_CTRL1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	GLOBAL_LINR_EN	R/W	0h	Global control for selecting between linear redriver or limited redriver. 0h = Limited 1h = Linear
6	TX_AC_EN	R/W	0h	Controls selection of ac-coupled or dc-coupled TX termination. When AC-coupled is enabled, 50 Ω termination on both P and N to VCC will be enabled. 0h = dc-coupled 1h = ac-coupled
5-4	GLOBAL_DCG	R/W	2h	CTLE DCGain for all lane. 0h = -3dB 1h = -3dB 2h = 0dB 3h = +1dB
3	TXTERM_AUTO_HDMI14	R/W	0h	Selects between no termination and 300 Ωs when TERM = 2h and operating in HDMI1.4. 0h = No termination for clock less than or equal to 165MHz and 300 Ω for clock greater than 225MHz 1h = 300 Ω
2	CTLEBYP_EN	R/W	0h	Selects whether or not CTLE bypass is enabled or not when GLOBAL_DCG is set to 2h and EQ set to 0h. 0h = CTLE bypass disabled 1h = CTLE bypass enabled
1-0	TERM	R/W	2h	TX termination control 0h = No termination 1h = 300 Ω 2h = Automatic based HDMI mode 3h = 100 Ω

7.5.1.7 GBL_CTLE_CTRL Register (Offset = Eh) [Reset = 3Fh]

GBL_CTLE_CTRL is shown in Table 7-31.

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Table 7-31 GBL_CTLE_CTRL Register Field Descriptions

Bit	Field	Type	Reset	Description
7-6	GLOBAL_CTLEBW	R/W	0h	CTLE bandwidth control. 0 is lowest and 3h is highest.
5-4	HDMI14_CTLE_SEL	R/W	3h	Selects the CTLE used when datarate is HDMI 1.4. Value programmed into this field will apply to data lanes only. Clock lane will always use 3Gbps CTLE. 0h = 3Gbps CTLE 1h = 6Gbps CTLE 2h = Auto select based on snoop datarate 3h = 12Gbps CTLE
3-2	HDMI20_CTLE_SEL	R/W	3h	Selects the CTLE used when datarate is HDMI 2.0. Value programmed into this field will apply to data lanes only. Clock lane will always use 3Gbps CTLE. 0h = 3Gbps CTLE 1h = 6Gbps CTLE 2h = Auto select based on snoop datarate 3h = 12Gbps CTLE
1-0	HDMI21_CTLE_SEL	R/W	3h	Selects the CTLE used when datarate is HDMI 2.1. Value programmed into this field will apply to all four lanes. 0h = 3Gbps CTLE 1h = 6Gbps CTLE 2h = Auto select based on snoop datarate 3h = 12Gbps CTLE

7.5.1.8 LANE_ENABLE Register (Offset = 11h) [Reset = 5Fh]

LANE_ENABLE is shown in Table 7-32.

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Table 7-32 LANE_ENABLE Register Field Descriptions

Bit	Field	Type	Reset	Description
7-6	HDMI20_VOD	R/W	1h	VOD control for limited redriver in HDMI 2.0 0h = Use values in CLK_VOD, D0_VOD, D1_VOD and D2_VOD 1h = Default (1000mV) 2h = Default - 5% 3h = Default + 5%
5-4	HDMI14_VOD	R/W	1h	VOD control for limited redriver in HDMI 1.4 0h = Use values in CLK_VOD, D0_VOD, D1_VOD and D2_VOD 1h = Default (1000mV) 2h = Default - 5% 3h = Default - 10%
3	CLK_LANE_EN	R/W	1h	Enable for CLK lane 0h = Disabled 1h = Enabled
2	D0_LANE_EN	R/W	1h	Enable for D0 lane 0h = Disabled 1h = Enabled
1	D1_LANE_EN	R/W	1h	Enable for D0 lane 0h = Disabled 1h = Enabled
0	D2_LANE_EN	R/W	1h	Enable for D0 lane 0h = Disabled 1h = Enabled

7.5.1.9 CLK_CONFIG1 Register (Offset = 12h) [Reset = 03h]

CLK_CONFIG1 is shown in Table 7-33.

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Table 7-33 CLK_CONFIG1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	CLK_TXFFE	R/W	0h	TXFFE control for CLK lane. This field is only honored in HDMI 2.1. 0h = 0.0dB 1h = 3.5dB 2h = 6.0dB 3h = Reserved 4h = -1.5dB 5h = -2.5dB 6h = -3.5dB 7h = -4.8dB
3	RESERVED	R	0h	Reserved
2-0	CLK_VOD	R/W	3h	Differential Swing control for CLK lane. 0h = Limited -15% Linear 800mV 1h = Limited -10% Linear 900mV 2h = Limited - 5% Linear 1000mV 3h = Limited 800mV Linear 1200mV 4h = Limited +5% Linear Reserved 5h = Limited +10% Linear Reserved 6h = Limited +15% Linear Reserved 7h = Limited +20% Linear Reserved

7.5.1.10 CLK_CONFIG2 Register (Offset = 13h) [Reset = 00h]

CLK_CONFIG2 is shown in Table 7-34.

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Table 7-34 CLK_CONFIG2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	RESERVED	R	0h	Reserved
3-0	CLK_EQ	R/W	0h	EQ control for CLK lane. This field is only honored in HDMI 2.1. 0h = Min EQ Fh = Max EQ

7.5.1.11 D0_CONFIG1 Register (Offset = 14h) [Reset = 03h]

D0_CONFIG1 is shown in Table 7-35.

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Table 7-35 D0_CONFIG1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	D0_TXFFE	R/W	0h	TXFFE control for D0 lane. 0h = 0.0dB 1h = 3.5dB 2h = 6.0dB 3h = Reserved 4h = -1.5dB 5h = -2.5dB 6h = -3.5dB 7h = -4.8dB
3	RESERVED	R	0h	Reserved
2-0	D0_VOD	R/W	3h	Differential Swing control for D0 lane. 0h = Limited -15% Linear 800mV 1h = Limited -10% Linear 900mV 2h = Limited - 5% Linear 1000mV 3h = Limited 1000mV Linear 1200mV 4h = Limited +5% Linear Reserved 5h = Limited +10% Linear Reserved 6h = Limited +15% Linear Reserved 7h = Limited +20% Linear Reserved

7.5.1.12 D0_CONFIG2 Register (Offset = 15h) [Reset = 00h]

D0_CONFIG2 is shown in Table 7-36.

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Table 7-36 D0_CONFIG2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	RESERVED	R	0h	Reserved
3-0	D0_EQ	R/W	0h	EQ control for D0 lane. 0h = Min EQ Fh = Max EQ

7.5.1.13 D1_CONFIG1 Register (Offset = 16h) [Reset = 03h]

D1_CONFIG1 is shown in Table 7-37.

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Table 7-37 D1_CONFIG1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	D1_TXFFE	R/W	0h	TXFFE control for D1 lane. 0h = 0.0dB 1h = 3.5dB 2h = 6.0dB 3h = Reserved 4h = -1.5dB 5h = -2.5dB 6h = -3.5dB 7h = -4.8dB
3	RESERVED	R	0h	Reserved
2-0	D1_VOD	R/W	3h	Differential Swing control for D1 lane. 0h = Limited -15% Linear 800mV 1h = Limited -10% Linear 900mV 2h = Limited - 5% Linear 1000mV 3h = Limited 1000mV Linear 1200mV 4h = Limited +5% Linear Reserved 5h = Limited +10% Linear Reserved 6h = Limited +15% Linear Reserved 7h = Limited +20% Linear Reserved

7.5.1.14 D1_CONFIG2 Register (Offset = 17h) [Reset = 00h]

D1_CONFIG2 is shown in Table 7-38.

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Table 7-38 D1_CONFIG2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	RESERVED	R	0h	Reserved
3-0	D1_EQ	R/W	0h	EQ control for D1 lane 0h = Min EQ Fh = Max EQ

7.5.1.15 D2_CONFIG1 Register (Offset = 18h) [Reset = 03h]

D2_CONFIG1 is shown in Table 7-39.

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Table 7-39 D2_CONFIG1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	D2_TXFFE	R/W	0h	TXFFE control for D2 lane 0h = 0.0dB 1h = 3.5dB 2h = 6.0dB 3h = Reserved 4h = -1.5dB 5h = -2.5dB 6h = -3.5dB 7h = -4.8dB
3	RESERVED	R	0h	Reserved
2-0	D2_VOD	R/W	3h	Differential Swing control for D2 lane. 0h = Limited -15% Linear 800mV 1h = Limited -10% Linear 900mV 2h = Limited - 5% Linear 1000mV 3h = Limited 1000mV Linear 1200mV 4h = Limited +5% Linear Reserved 5h = Limited +10% Linear Reserved 6h = Limited +15% Linear Reserved 7h = Limited +20% Linear Reserved

7.5.1.16 D2_CONFIG2 Register (Offset = 19h) [Reset = 00h]

D2_CONFIG2 is shown in Table 7-40.

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Table 7-40 D2_CONFIG2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	RESERVED	R	0h	Reserved
3-0	D2_EQ	R/W	0h	EQ control for D2 lane. 0h = Min EQ Fh = Max EQ

7.5.1.17 SIGDET_TH_CFG Register (Offset = 1Ah) [Reset = 44h]

SIGDET_TH_CFG is shown in Table 7-41.

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Table 7-41 SIGDET_TH_CFG Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	CFG_SIGDET_HYST	R/W	4h	Controls the SIGDET hysteresis. Value programmed into this field plus value programmed into CFG_SIGDET_VTH field defines the SIGDET assert threshold. 0h = 0mV 1h = 12mV 2h = 25mV 3h = 37mV 4h = 55mV 5h = 63mV 6h = 75mV 7h = 90mV
3	RESERVED	R	0h	Reserved
2-0	CFG_SIGDET_VTH	R/W	4h	Controls the SIGDET de-assert voltage threshold. 0h = 58mV 1h = 60mV 2h = 72mV 3h = 84mV 4h = 95mV 5h = 108mV 6h = 120mV 7h = 135mV

7.5.1.18 GBL_STATUS Register (Offset = 1Ch) [Reset = 00h]

GBL_STATUS is shown in Table 7-42.

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Table 7-42 GBL_STATUS Register Field Descriptions

Bit	Field	Type	Reset	Description
7	PD_STATUS	RH	0h	Power Down status
6	STANDBY_STATUS	RH	0h	Standby Status
5-0	RESERVED	R	0h	Reserved

7.5.1.19 AEQ_CONTROL1 Register (Offset = 1Dh) [Reset = F3h]

AEQ_CONTROL1 is shown in Table 7-43.

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Table 7-43 AEQ_CONTROL1 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	FULLAEQ_UPPER_EQ	R/W	Fh	Maximum EQ value to check for full AEQ mode
3-2	AEQ_PATTERN_CTRL	R/W	0h	Control how link training pattern snooping for EQ adaptation 0h = Require a read of pattern register 41h/42h after a rate change. Allow eq adaptation for patterns 0, 5, 6, 7, and 8. 1h = Require a read of pattern register 41h/42h after a rate change. Allow eq adaptation for patterns 5, 6, 7, and 8. 2h = Allow eq adaptation for patterns 0, 5, 6, 7, and 8. No need for read after rate change 3h = Allow eq adaptation for patterns 5, 6, 7, and 8. No need for read after rate change.
1	AEQ_START_CTRL	R/W	1h	Control whether starts based on signal detect or both signal detect and FLT_UPDATE cleared 0h = Only require signal detect 1h = Require signal detect and clearing of FLT_UPDATE
0	AEQ_TX_DELAY_EN	R/W	1h	Control whether TX remains disabled during EQ adaptation 0h = TX active during adaptation 1h = TX disabled during adaptation

7.5.1.20 AEQ_CONTROL2 Register (Offset = 1Eh) [Reset = 00h]

AEQ_CONTROL2 is shown in Table 7-44.

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Table 7-44 AEQ_CONTROL2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	AEQ_MODE	R/W	0h	Selects between two Adaption modes 0h = AEQ with hits counted at mideye for every EQ. 1h = AEQ with hits counted at mideye only for EQ equal 0.
6	AEQ_EN	R/W	0h	Controls whether or not adaptive EQ is enabled. 0h = AEQ disabled 1h = AEQ enabled
5-4	RESERVED	R/W	0h	Reserved
3	OVER_EQ_SIGN	R/W	0h	Selects the sign for OVER_EQ_CTRL field. 0h = positive 1h = negative
2-0	OVER_EQ_CTRL	R/W	0h	This field will increase or decrease the AEQ by value programmed into this field. For example, full AEQ value is 6 and this field is programmed to 2 and OVER_EQ_SIGN = 0, then EQ value used will be 8. This field is only used in Full AEQ mode. 0h = 0 or -8 1h = 1 or -7 2h = 2 or -6 3h = 3 or -5 4h = 4 or -4 5h = 5 or -3 6h = 6 or -2 7h = 7 or -1

7.5.1.21 SCDC_TMDS_CONFIG Register (Offset = 20h) [Reset = 00h]

SCDC_TMDS_CONFIG is shown in Table 7-45.

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Table 7-45 SCDC_TMDS_CONFIG Register Field Descriptions

Bit	Field	Type	Reset	Description
7-2	RESERVED	R	0h	Reserved
1	TMDS_CLK_RATIO	RH/W	0h	TMDS Bit Period to TMDS Clock Period Ratio. Reads last value snooped through DDC read/write or I2C write. 0h = 1/10 (HDMI 1.4b) 1h = 1/40 (HDMI 2.0)
0	RESERVED	R	0h	Reserved

7.5.1.22 SCDC_SINK_CONFIG Register (Offset = 31h) [Reset = 00h]

SCDC_SINK_CONFIG is shown in Table 7-46.

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Table 7-46 SCDC_SINK_CONFIG Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	FFE_LEVELS	RH/W	0h	Indicates the maximum TXFFE level supported for the current FRL rate. Read last value snooped through DDC read/write or I2C write. 0h = Only TXFFE0 supported 1h = TXFFE0-1 supported 2h = TXFFE0-2 supported 3h = TXFFE0-3 supported
3-0	FRL_RATE	RH/W	0h	Selects FRL rate and lane count. Read last value snooped through DDC read/write or I2C write. 0h = Disable FRL 1h = 3Gbps on 3 lanes 2h = 6Gbps on 3 lanes 3h = 6Gbps on 4 lanes 4h = 8Gbps on 4 lanes 5h = 10Gbps on 4 lanes 6h = 12Gbps on 4 lanes

7.5.1.23 SCDC_SRC_TEST Register (Offset = 35h) [Reset = 00h]

SCDC_SRC_TEST is shown in Table 7-47.

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Table 7-47 SCDC_SRC_TEST Register Field Descriptions

Bit	Field	Type	Reset	Description
7-6	RESERVED	R	0h	Reserved
5	FLT_NO_TIMEOUT	RH/W	0h	Set by sink test equipment to have source not time out during FRL link training 0h = Normal operation 1h = Source does not timeout
4	RESERVED	R	0h	Reserved
3	TX_NO_FFE	RH/W	0h	Test mode to disable FFE. Read last value snooped through DDC read/write or I2C write. 0h = Normal TXFFE 1h = TX sent with no FFE
2	TX_DEEMPH_ONLY	RH/W	0h	Test mode to enable de-emphasis only. Read last value snooped through DDC read/write or I2C write. 0h = Normal TXFFE 1h = TX sent de-emphasis only
1	TX_PRESHOOT_ONLY	RH/W	0h	Test mode to enable pre-shoot only. Read last value snooped through DDC read/write or I2C write. 0h = Normal TXFFE 1h = TX sent with pre-shoot only
0	RESERVED	R	0h	Reserved

7.5.1.24 SCDC_STATUS10 Register (Offset = 41h) [Reset = 00h]

SCDC_STATUS10 is shown in Table 7-48.

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Table 7-48 SCDC_STATUS10 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	LN1_LTP_REQ	RH/W	0h	Link training pattern request for lane 1. Reads last value read through DDC or written through I2C. A DDC read/I2C write of Eh advances the current FFE level for this lane saturating at the value of FFE_LEVELS. A DDC read/I2C write of Fh clears for FFE level for all lanes to TXFFE0.
3-0	LN0_LTP_REQ	RH/W	0h	Link training pattern request for lane 0. Reads last value read through DDC or written through I2C. A DDC read/I2C write of Eh advances the current FFE level for this lane saturating at the value of FFE_LEVELS. A DDC read/I2C write of Fh clears for FFE level for all lanes to TXFFE0.

7.5.1.25 SCDC_STATUS32 Register (Offset = 42h) [Reset = 00h]

SCDC_STATUS32 is shown in Table 7-49.

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Table 7-49 SCDC_STATUS32 Register Field Descriptions

Bit	Field	Type	Reset	Description
7-4	LN3_LTP_REQ	RH/W	0h	Link training pattern request for lane 3. Reads last value read through DDC or written through I2C. A DDC read/I2C write of Eh advances the current FFE level for this lane saturating at the value of FFE_LEVELS. A DDC read/I2C write of Fh clears for FFE level for all lanes to TXFFE0.
3-0	LN2_LTP_REQ	RH/W	0h	Link training pattern request for lane 2. Reads last value read through DDC or written through I2C. A DDC read/I2C write of Eh advances the current FFE level for this lane saturating at the value of FFE_LEVELS. A DDC read/I2C write of Fh clears for FFE level for all lanes to TXFFE0.

7.5.1.26 AEQ_STATUS Register (Offset = 50h) [Reset = 80h]

AEQ_STATUS is shown in Table 7-50.

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Table 7-50 AEQ_STATUS Register Field Descriptions

Bit	Field	Type	Reset	Description
7	AEQDONE_STAT	RH	1h	This field is low while AEQ is active and high when it is done. It is valid when FRL training and AEQ_EN = 1 or when FORCE_AEQ_EN = 1 and HW has reset FORCE_AEQ back to 0. 0h = AEQ is running 1h = AEQ is done
6	AEQ_HC_OVERFLOW	RH	0h	13-bit AEQ hit counter overflow status
5	RESERVED	R	0h	Reserved
4	RXD1_DONE_STAT	RH	0h	This flag is set after DAC wait timer expires.
3-0	RXD1_AEQ_STAT	RH	0h	Optimal EQ determined by FSM after the completion of Full AEQ. This field will include the value programmed into OVER_EQ_CTRL field.

7.5.1.27 AEQ_STATUS2 Register (Offset = 51h) [Reset = 00h]

AEQ_STATUS2 is shown in Table 7-51.

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Table 7-51 AEQ_STATUS2 Register Field Descriptions

Bit	Field	Type	Reset	Description
7	RESERVED	R	0h	Reserved
6-4	VOD_RANGE_STAT	RH	0h	VOD range selected by the last AEQ run
3-0	AEQ_EYE_STAT	RH	0h	EYE status from the last AEQ run. Relative to the max limit of 15.