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Pinout and signal descriptions
36
NS9750 Hardware Reference
AE14 gpio[12]
1
U 2 I/O 00 Ser port A DTR
01 Reserved
02 Reserved
03 GPIO 12
AF14 gpio[13] U 2 I/O 00 Ser port A DSR
01 Ext IRQ 0 (duplicate)
02 Timer 10 (duplicate)
03 GPIO 13
AF13 gpio[14] U 2 I/O 00 Ser port A RI / SPI port A clk
01 Timer 1
02 Reserved
03 GPIO 14
AE13 gpio[15] U 2 I/O 00 Ser port A DCD / SPI port A enable
01 Timer 2
02 Reserved
03 GPIO 15
AD13 gpio[16]
2
U 2 I/O 00 Reserved
01 1284 nFault (peripheral-driven, duplicate)
3
02 Timer 11 (duplicate)
03 GPIO 16
AF12 gpio[17]
1,2
U 2 I/O 00 USB power relay
01 Reserved
02 Reserved
03 GPIO 17
AE12 gpio[18] U 4 I/O 00 Ethernet CAM reject
01 LCD power enable
02 Ext IRQ 3 (duplicate)
03 GPIO 18
AD12 gpio[19]
1
U 4 I/O 00 Ethernet CAM req
01 LCD line-horz sync
02 DMA ch 2 read enable (duplicate)
03 GPIO 19
Pin #
Signal
name
U/D
OD
(mA)
I/O Description (4 options: 00, 01, 02, 03)
Table 10: GPIO MUX pinout