SPRSP57E april 2020 – june 2023 DRA821U , DRA821U-Q1
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The MMCSDi (i = 1) controller is also referred to as MMCi.
MMCSDi interface is compliant with the SD Host Controller Standard Specification 4.10 and SD Physical Layer Specification v3.01 as well as SDIO Specification v3.00 and it supports the following SD Card applications:
Table 7-64 presents the required delay software configuration settings for MMC1 timing modes.
REGISTER NAME | MMCSD12_SS_PHY_CTRL_4_REG | MMCSD12_SS_PHY_CTRL_5_REG | ||||
---|---|---|---|---|---|---|
BIT FIELD | [20] | [15:12] | [8] | [4:0] | [2:0] | |
BIT FIELD NAME | OTAPDLYENA | OTAPDLYSEL | ITAPDLYENA | ITAPDLYSEL | CLKBUFSEL | |
MODE | DESCRIPTION | DELAY ENABLE |
DELAY VALUE |
INPUT DELAY ENABLE |
INPUT DELAY VALUE |
DELAY BUFFER DURATION |
Default Speed |
4-bit PHY operating 3.3 V, 25 MHz |
0x1 | 0x0 | 0x0 | 0x0 | 0x7 |
High Speed |
4-bit PHY
operating 3.3 V, 50 MHz |
0x1 | 0x0 | 0x0 | 0x0 | 0x7 |
UHS-I SDR12 |
4-bit PHY
operating 1.8 V, 25 MHz |
0x1 | 0xF | 0x0 | 0x0 | 0x7 |
UHS-I SDR25 |
4-bit PHY
operating 1.8 V, 50 MHz |
0x1 | 0xF | 0x0 | 0x0 | 0x7 |
UHS-I SDR50 |
4-bit PHY
operating 1.8 V, 100 MHz |
0x1 | 0xC | 0x1 | Tuning | 0x7 |
UHS-I DDR50 |
4-bit PHY
operating 1.8 V, 50 MHz |
0x1 | 0xC | 0x1 | Tuning | 0x7 |
UHS-I SDR104 |
4-bit PHY operating 1.8, V 200 MHz |
0x1 | 0x5 | 0x1 | Tuning | 0x7 |
Table 7-84 represents MMCSD1 timing conditions.
PARAMETER | DESCRIPTION | MODE | MIN | MAX | UNIT |
---|---|---|---|---|---|
INPUT CONDITIONS | |||||
SRI | Input slew rate | Default Speed, High Speed | 0.69 | 2.06 | V/ns |
UHS-I SDR12, UHS-I SDR25 | 0.34 | 1.34 | V/ns | ||
OUTPUT CONDITIONS | |||||
CL | Output load capacitance | All Speed Modes | 1 | 10 | pF |
PCB CONNECTIVITY REQUIREMENTS | |||||
td(Trace Delay) | Propagation delay of each trace | Default Speed, High Speed | 126 | 1200 | ps |
UHS-I DDR50 | 255 | 1134 | ps | ||
All Other Modes | 134 | 1276 | ps | ||
td(Trace Mismatch Delay) | Propagation delay mismatch across all traces | UHS-I DDR50 | 20 | ps | |
UHS-I SDR104 | 8 | ps | |||
All Other Modes | 100 | ps |