Mmc/Sd Signal Pads - Texas Instruments OMAP5910 Technical Reference Manual

Table 7–91. MMC/SD Signal Pads
Pad Name Type
MMC.CLK Out
MMC.CMD_SPI. In-Out
DO/SPI_SO
MMC.DAT[0] In-Out
/SPI_SI
MMC.DAT[3-1] In-Out
(*1)
GPIO2 In- Out
(SPI.CLK) (Out)
(*2)
GPIO3 In-Out
(SPI.C/Sn[3]) (Out)
(*2)
GPIO4 In-Out
(SPI.C/Sn[2]) (Out)
(*2)
GPIO6 In-Out
(SPI.C/Sn[1]) (Out)
(*2)
GPIO0 In-Out
(SPI.RDY) (In)
(*2)
Notes: 1) Optional signals. Only needed for SD cards.
2) Optional signals. Only needed for devices with SPI interfaces (serial flash, etc.).
3) This pullup is enabled/disabled dynamically by the MMC/SD host controller.
Pullup/ Reset
Description
Pulldown Value
- 0 MMC/SD card CLK signal.
Only active during active command to a MMC/SD card
using MMC or SPI protocols.
Pullup Input MMC/SD card CMD signal in MMC/SD mode.
(*3)
SPI serial out signal in SPI mode (output—goes to serial
In of target device(s)).
Pullup Input MMC card DAT or SD card DAT[0] signal in MMC/SD
(*3) mode.
SPI serial in signal in SPI mode (input—comes from serial
out of target device(s)).
Pullup Input SD card DAT[3-1] signals in MMC/SD mode.
(*3)
Reserved signals for MMC card or in SPI mode.
Pulldown Input By default, pad used by the GPIO2. The SPI_CLK output
(disabled) signal can be multiplexed.
(0)
SPI_CLK only active during SPI transfers to serial flash or
other SPI devices (except MMC/SD cards).
Pulldown Input By default, pad used by the GPIO3. The SPI CSn(3)
(disabled) (1) output signal can be multiplexed. SPI CSn(3) is active
low, only active in SPI mode during SPI transfers.
Reserved in MMC/SD mode.
Pulldown Input By default, pad used by the GPIO4. The SPI CSn(2)
(disabled) (1) output signal can be multiplexed. SPI CSn(2) is active
low, only active in SPI mode during SPI transfers.
Reserved in MMC/SD mode.
Pulldown Input By default, pad used by the GPIO6. The SPI CSn(1)
(disabled) (1) output signal can be multiplexed. SPI CSn(1) is active
low, only active in SPI mode during SPI transfers.
Reserved in MMC/SD mode.
Pulldown Input By default, pad used by the GPIO0. The SPI ready/busy
(disabled) (Input) input can be multiplexed. When SPI_RDY is low, it
denotes busy condition. Only active in SPI mode during
SPI transfers. Reserved signal in MMC/SD mode
MMC/SD Host Controller
MPU Public Peripherals 7-123