AM1705 datasheet(17/156 Pages) TI

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AM1705

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SPRS657A – FEBRUARY 2010 – REVISED APRIL 2010

3.6.3

External Memory Interface A (ASYNC)

Table 3-5. External Memory Interface A (EMIFA) Terminal Functions

SIGNAL NAME

TYPE(1)

PULL(2)

MUXED

DESCRIPTION

PTP

MMC/SD, GPIO,

EMA_D[7]/MMCSD_DAT[7]/GP0[7]/BOOT[13]

I/O

IPU

BOOT

EMA_D[6]/MMCSD_DAT[6]/GP0[6]

I/O

IPU

EMA_D[5]/MMCSD_DAT[5]/GP0[5]

I/O

IPU

EMA_D[4]/MMCSD_DAT[4]/GP0[4]

I/O

IPU

MMC/SD, GPIO

EMIFA data bus

EMA_D[3]/MMCSD_DAT[3]/GP0[3]

I/O

IPU

EMA_D[2]/MMCSD_DAT[2]/GP0[2]

I/O

IPU

EMA_D[1]/MMCSD_DAT[1]/GP0[1]

I/O

IPU

MMC/SD, GPIO,

EMA_D[0]/MMCSD_DAT[0]/GP0[0]/BOOT[12]

I/O

IPU

BOOT

EMA_A[12]/GP1[12]

IPU

EMA_A[11]/ GP1[11]

IPU

EMA_A[10]/GP1[10]

IPU

EMA_A[9]/GP1[9]

IPU

EMA_A[8]/GP1[8]

IPU

GPIO

EMIFA address bus

EMA_A[7]/GP1[7]

IPD

EMA_A[6]/GP1[6]

IPD

EMA_A[5]/GP1[5]

IPD

EMA_A[4]/GP1[4]

IPD

EMA_A[3]/GP1[3]

IPD

EMA_A[2]/MMCSD_CMD/GP1[2]

IPU

MMCSD, GPIO

EMA_A[1]/MMCSD_CLK/GP1[1]

IPU

EMIFA address bus.

EMA_A[0]/GP1[0]

IPD

GPIO

EMA_BA[1]/GP1[13]

IPU

EMIFA bank address

EMA_BA[0]/GP1[14]

IPU

GPIO

EMA_CS[3] /GP2[6]

IPU

GPIO

EMIFA Async Chip

Select

EMA_CS[2]/GP2[5]/BOOT[15]

IPU

GPIO, BOOT

EMA_OE /AXR0[13]/GP2[7]

IPU

McASP0, GPIO

EMIFA output enable.

EMIFA wait

EMA_WAIT[0]/ GP2[10]

IPU

GPIO

input/interrupt.

(1)

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

Note: The pin type shown refers to the input, output or high-impedance state of the pin function when configured as the the signal name

highlighted in bold. All multiplexed signals may enter a high-impedance state when the configured function is input-only or the configured

function supports high-Z operation. All GPIO signals can be used as input or output. For multiplexed pins where functions have different

types (ie., input versus output), the table reflects the pin function direction for that particular peripheral.

(2)

IPD = Internal Pulldown resistor, IPU = Internal Pullup resistor

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