TX53

PIN

Type

Function

i.MX53 Pad Name

Alternate functions

GPIO

Description (refer to i.MX53 manuals for details)

47

3V3

CSPI_MISO

EIM_D17

WEIM_D[17]

DI0_PIN6

DISPB1_SER_DIN

ECSPI1_MISO

I2C3_SCL

GPIO3[17] Master In/Slave Out signal

48

3V3

CSPI_SCLK

EIM_D16

WEIM_D[16]

DI0_PIN5

DISPB1_SER_CLK

ECSPI1_SCLK

I2C2_SDA

GPIO3[16] Serial Clock signal

49

3V3

CSPI_RDY

GPIO_19

KPP_COL[5]

CCM_CLKO

SPDIF_OUT1

RTC_CE_RTC_EXT_TRIG2

ECSPI1_RDY

FEC_TDATA[3]

INT_BOOT

GPIO4[5]

Serial Data Ready signal

50

GND

GND

SD – Secure Digital Interface 1

51

3V3

SD1_CD

EIM_D24

WEIM_D[24]

UART3_TXD

ECSPI1_SS2

CSPI_SS2

AUD5_RXFS

ECSPI2_SS2

UART1_DTR

GPIO3[24] SD Card Detect – connected to a GPIO

52

3V3

SD1_D[0]

SD1_DATA0

ESDHC1_DAT0

GPT_CAPIN1

CSPI_MISO

CCM_PLL3_BYP

GPIO1[16]

SD Data bidirectional signals—If the system designer does not want

to make use of the internal pull-up, via the Pull-up enable register, a

50 K–69 K external pull up resistor must be added.

53

3V3

SD1_D[1]

SD1_DATA1

ESDHC1_DAT1

GPT_CAPIN2

CSPI_SS0

CCM_PLL4_BYP

GPIO1[17]

54

3V3

SD1_D[2]

SD1_DATA2

ESDHC1_DAT2

GPT_CMPOUT2

PWM2_PWMO

WDOG1_WDOG_B

CSPI_SS1

CCM_PLL2_BYP

GPIO1[19]

55

3V3

SD1_D[3]

SD1_DATA3

ESDHC1_DAT3

GPT_CMPOUT3

PWM1_PWMO

WDOG2_WDOG_B

CSPI_SS2

SATA_PHY_DTB[1]

GPIO1[21]

56

3V3

SD1_CMD

SD1_CMD

ESDHC1_CMD

GPT_CMPOUT1

CSPI_MOSI

CCM_PLL1_BYP

GPIO1[18] SD Command bidirectional signal

57

3V3

SD1_CLK

SD1_CLK

ESDHC1_CLK

OSC32K_32K_OUT

GPT_CLKIN

CSPI_SCLK

SATA_PHY_DTB[0]

GPIO1[20] SD Output Clock.

58

GND

GND

59

3V3

TXD

PATA_DIOW

PATA_DIOW

UART1_TXD

USBPHY2_DATAOUT[2]

GPIO6[17] Application UART 1 Transmit Data output signal

60

3V3

RXD

PATA_DMACK

PATA_DMACK

UART1_RXD

USBPHY2_DATAOUT[3]

GPIO6[18] Application UART 1 Receive Data input signal

61

3V3

RTS

PATA_IORDY

PATA_IORDY

ESDHC3_CLK

UART1_RTS

CAN2_RXCAN

USBPHY1_DATAOUT[1]

GPIO7[5]

Application UART 1 Request to Send input signal

62

3V3

CTS

PATA_RESET_B

PATA_RESET_B

ESDHC3_CMD

UART1_CTS

CAN2_TXCAN

USBPHY1_DATAOUT[0]

GPIO7[4]

Application UART 1 Clear to Send output signal

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