SLLSF57A August 2022 – April 2024 TMDS1204
PRODUCTION DATA
The equalizer is used to clean up inter-symbol interference (ISI) jitter or loss from the bandwidth-limited board traces or cables. TMDS1204 supports fixed receiver equalizer by setting the EQ0 and EQ1 pins or through the I2C register. Table 7-6 lists the pin strap settings and EQ values.
The TMDS1204 has three sets of CTLE curves (3Gbps CTLE, 6Gbps CTLE, and 12Gbps CTLE) with each curve having 16 AC gain settings and 3 DC gain settings. Table 7-6 provides details about the 16 AC gain settings with GLOBAL_DCG = 0x2.
The TMDS1204 in pin-strap mode has three CTLE HDMI Datarate Maps: Map A, Map B, and Map C. Table 7-7 provides details about these maps. The expectation is Map A and C should be used if TMDS1204 is used in a source application and Map B for a sink application.
Table 7-8 lists how the sampled state of the CTLEMAP_SEL pin determines the default CTLE HDMI Datarate map when the TMDS1204 is configured for pin-strap mode.
In I2C mode, the default CTLE (3Gbps, 6Gbps, or 12Gbps) used for each HDMI mode can be controlled from a register.
EQ Setting(1) | RX EQ Level for 3Gbps CTLE (Gain at 1.5GHz – Gain at 10-MHz) |
RX EQ Level for 6Gbps CTLE (Gain at 3GHz – Gain at 10-MHz) |
RX EQ Level for 12Gbps CTLE (Gain at 6GHz – Gain at 10-MHz) |
EQ1 PIN | EQ0 PIN |
---|---|---|---|---|---|
0(2) | 1.0 | 0.5 | 0 | 0 | 0 |
1 | 2.0 | 1.0 | 0.8 | 0 | R |
2 | 3.2 | 2.4 | 1.8 | 0 | F |
3 | 4.2 | 3.3 | 2.7 | 0 | 1 |
4 | 5.3 | 4.4 | 3.7 | R | 0 |
5 | 6.0 | 5.2 | 4.4 | R | R |
6 | 7.0 | 6.0 | 5.0 | R | F |
7 | 7.7 | 6.8 | 5.8 | R | 1 |
8 | 9.0 | 7.5 | 6.5 | F | 0 |
9 | 9.5 | 8.2 | 7.5 | F | R |
10 | 10.0 | 8.8 | 8.3 | F | F |
11 | 10.5 | 9.3 | 9.1 | F | 1 |
12 | 11.0 | 10.0 | 9.8 | 1 | 0 |
13 | 11.5 | 10.5 | 10.3 | 1 | R |
14 | 12.0 | 11.0 | 11.0 | 1 | F |
15 | 12.3 | 11.8 | 11.6 | 1 | 1 |
HDMI Mode | Map A | Map B | Map C |
---|---|---|---|
1.4 | 12Gbps CTLE |
3Gbps CTLE |
6Gbps CTLE |
2.0 | 12Gbps CTLE |
6Gbps CTLE |
6Gbps CTLE |
3Gbps FRL | 12Gbps CTLE |
3Gbps CTLE |
6Gbps CTLE |
6Gbps FRL | 12Gbps CTLE |
6Gbps CTLE |
6Gbps CTLE |
8Gbps FRL | 12Gbps CTLE |
12Gbps CTLE |
12Gbps CTLE |
10Gbps FRL | 12Gbps CTLE |
12Gbps CTLE |
12Gbps CTLE |
12Gbps FRL | 12Gbps CTLE |
12Gbps CTLE |
12Gbps CTLE |
Sampled State of CTLEMAP_SEL pin | ||||
---|---|---|---|---|
"0" | "R" | "F" | "1" | |
CTLE HDMI Datarate Map | Map B |
Map C |
Map B | Map A |