TX28

PIN

Type

Function

i.MX28 Pad Name

Alternate functions

GPIO

Description (refer to i.MX28 manuals for details)

72

3V3

KP_COL[0]

I2C-bus I/O port / PCA9554 - IO0

73

3V3

KP_COL[1]

-

I2C-bus I/O port / PCA9554 - IO1

74

3V3

KP_COL[2]

-

I2C-bus I/O port / PCA9554 - IO2

75

3V3

KP_COL[3]

-

I2C-bus I/O port / PCA9554 - IO3

76

3V3

TXCAN

GPMI_RDY2

CAN0_TX

ENET0_TX_ER

GPIO0_22

77

3V3

KP_ROW[0]

-

I2C-bus I/O port / PCA9554 - IO4

78

3V3

KP_ROW[1]

-

I2C-bus I/O port / PCA9554 - IO5

79

3V3

KP_ROW[2]

-

I2C-bus I/O port / PCA9554 - IO6

80

3V3

KP_ROW[3]

-

I2C-bus I/O port / PCA9554 - IO7

81

3V3

RXCAN

GPMI_RDY3

CAN0_RX

HSADC_TRIGGER

GPIO0_23

82

GND

GND

SSI 1 - Serial Audio Port 1

83

3V3

SSI1_INT

SAIF0_MCLK

PWM_3

AUART4_CTS

GPIO3_20 GPIO

84

3V3

SSI1_RXD

SAIF1_SDATA0

PWM_7

SAIF0_SDATA1

GPIO3_26 Serial Audio Interface 0 serial data line 1

85

3V3

SSI1_TXD

SAIF0_SDATA0

PWM_6

AUART4_TX

GPIO3_23 Serial Audio Interface 0 serial data line 0

86

3V3

SSI1_CLK

SAIF0_BITCLK

PWM_5

AUART4_RX

GPIO3_22 Serial Audio Interface 0 serial bit clock

87

3V3

SSI1_FS

SAIF0_LRCLK

PWM_4

AUART4_RTS

GPIO3_21 Serial Audio Interface 0 left/right clock

88

GND

GND

SSI 2 - Serial Audio Port 2

89

3V3

SSI2_INT

LCD_DOTCLK

SAIF1_MCLK

ETM_TCLK

GPIO1_30 GPIO

90

3V3

SSI2_RXD

LCD_HSYNC

SAIF1_SDATA1

ETM_TCTL

GPIO1_29 Serial Audio Interface 1 serial data line 1

91

3V3

SSI2_TXD

LCD_VSYNC

SAIF1_SDATA0

GPIO1_28 Serial Audio Interface 1 serial data line 0

92

3V3

SSI2_CLK

AUART2_CTS

I2C1_SCL

SAIF1_BITCLK

GPIO3_10 Serial Audio Interface 1 serial bit clock

93

3V3

SSI2_FS

AUART2_RTS

I2C1_SDA

SAIF1_LRCLK

GPIO3_11 Serial Audio Interface 1 left/right clock

94

GND

GND

Secure Digital Interface 2

95

NC

not connected

96

NC

not connected

97

NC

not connected

98

NC

not connected

99

NC

not connected

100

NC

not connected

101

3V3

ENET_CLK

Fixed function clock output to Ethernet PHY

(not available on engineering sample version TX28-4020)

102

GND

GND

Ka-Ro electronics GmbH - Pascalstr. 22, D-52076 Aachen, Germany - Tel.: +49 2408 1402-0 (FAX -10)

www.karo-electronics.de