AM3892 datasheet(74/299 Pages) TI

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AM3894

AM3892

SPRS681A – OCTOBER 2010 – REVISED MARCH 2011

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3.2.13 Secure Digital/Secure Digital Input Output (SD/SDIO) Signals

Table 3-16. SD/SDIO Terminal Functions

SIGNAL

TYPE(1)

OTHER(2) (3)

MUXED

DESCRIPTION

NAME

NO.

SD_CLK/

PULL: IPD / DIS

GPMC, GP1

GPMC_A[13]/

DRIVE: L / L

SD Clock output

PINCTRL158

GP1[1]

DVDD_3P3

SD_CMD/

PULL: IPD / DIS

GPMC, GP1

GPMC_A[21]/

DRIVE: Z / Z

SD Command output

PINCTRL159

GP1_[2]

DVDD_3P3

SD_DAT[0]/

PULL: IPD / IPD

GPMC, GP1

SD Data0 I/O. Functions as data bit 0 for 4-bit SD

GPMC_A[20]/

I/O

DRIVE: Z / Z

PINCTRL160

mode and single data bit for 1-bit SD mode.

GP1[3]

DVDD_3P3

SD_DAT[1]_SDIRQ/

PULL: IPD / IPD

GMPC, GP1

SD Data1 I/O. Functions as data bit 1 for 4-bit SD

GPMC_A[19]/

I/O

DRIVE: Z / Z

PINCTRL161

mode and as an IRQ input for 1-bit SD mode

GP1[4]

DVDD_3P3

SD_DAT[2]_SDRW/

PULL: IPD / IPD

GPMC, GP1

SD Data2 I/O. Functions as data bit 2 for 4-bit SD

GPMC_A[18]/

I/O

DRIVE: Z / Z

PINCTRL162

mode and as a Read Wait input for 1-bit SD mode.

GP1[5]

DVDD_3P3

SD_DAT[3]/

PULL: IPD / IPD

GPMC, GP1

SD Data3 I/O. Functions as data bit 3 for 4-bit SD

GPMC_A[17]/

T13

I/O

DRIVE: Z / Z

PINCTRL163

mode.

GP1[6]

DVDD_3P3

SD_POW/

PULL: IPD / DIS

GPMC, GP1

GPMC_A[14]/

DRIVE: L / L

SD Card Power Enable output

PINCTRL157

GP1[0]

DVDD_3P3

SD_SDCD/

PULL: IPD / IPD

GPMC, GP1

GPMC_A[16]/

R13

DRIVE: Z / Z

SD Card Detect input

PINCTRL164

GP1[7]

DVDD_3P3

SD_SDWP/

PULL: IPD / IPD

GMC, GP1

GPMC_A[15]/

DRIVE: Z / Z

SD Card Write Protect input

PINCTRL165

GP1[8]

DVDD_3P3

(1)

I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal.

(2)

PULL: A / B, where:

A is the state of the internal pull resistor during POR reset

B is the state of the internal pull resistor after POR and Warm reset are de-asserted and during Warm reset

IPD = Internal Pulldown Enabled, IPU = Internal Pullup Enabled, DIS = Internal Pull Disabled

DRIVE: A / B, where;

A is the driving state of the pin during POR reset

B is the driving state of the pin after POR and Warm reset are de-asserted and during Warm reset

H = Driving High, L = Driving Low, Z = 3-State

For more detailed information on pullup/pulldown resistors and situations where external pullup/pulldown resistors are required, see

Section 4.2.1, Pullup/Pulldown Resistors.

(3)

Specifies the operating I/O supply voltage for each signal.

Device Pins

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