![](http://datasheet.mmic.net.cn/120000/MPD800261F1-523-HN2_datasheet_3559971/MPD800261F1-523-HN2_18.png)
18
Preliminary Data Sheet A17989EE1V0DS00
PD800261
Table 1-5: General Purpose I/O Pin Functions
Pin Name
I/ONote
Function
Alternate FunctionNote
GPIO(44:43)
I/O
General purpose I/O signal
LBU_IRQ(1:0)_N
GPIO42
I/O
General purpose I/O signal
LBU_RDY_N
GPIO41
I/O
General purpose I/O signal
LBU_D15
GPIO40
I/O
General purpose I/O signal
LBU_CS_M_N
GPIO39
I/O
General purpose I/O signal
LBU_CS_R_N
GPIO(38:37)
I/O
General purpose I/O signal
LBU_SEG(1:0)_N
GPIO(36:32)
I/O
General purpose I/O signal
LBU_A(20:16)
GPIO31
I/O
General purpose I/O signal
DBGREQ
GPIO(30:24)
I/O
General purpose I/O signal
-
GPIO23
I/O
General purpose I/O signal
SPI1_SCLKIN
GPIO22
I/O
General purpose I/O signal
SPI1_SFRMIN/DBGACK
GPIO21
I/O
General purpose I/O signal
SPI1_SFRMOUT
GPIO20
I/O
General purpose I/O signal
SPI1_CLKOUT
GPIO19
I/O
General purpose I/O signal
SPI1_SSPTXD
GPIO18
I/O
General purpose I/O signal
SPI1_SSPRXD
GPIO17
I/O
General purpose I/O signal
SPI1_SSPOE
GPIO16
I/O
General purpose I/O signal
SPI1_SSPCTLOE
GPIO15
I/O
General purpose I/O signal
WD_WDOUT0_N
GPIO14
I/O
General purpose I/O signal
DBGACK
GPIO13
I/O
General purpose I/O signal
-
GPIO12
I/O
General purpose I/O signal
UART-CTS_N
GPIO11
I/O
General purpose I/O signal
UART-DSR_N
GPIO10
I/O
General purpose I/O signal
UART-DCD_N
GPIO9
I/O
General purpose I/O signal
UART-RXD
GPIO8
I/O
General purpose I/O signal
UART-TXD
GPIO7
I/O
General purpose I/O signal
P2-RX-LED_N/P2-TX-LED_N/P2-ACTIVE-LED_N
GPIO6
I/O
General purpose I/O signal
P1-RX-LED_N/P1-TX-LED_N/P1-ACTIVE-LED_N
GPIO5
I/O
General purpose I/O signal
P2-LINK-LED_N
GPIO4
I/O
General purpose I/O signal
P1-LINK-LED_N
GPIO3
I/O
General purpose I/O signal
P2-SPEED-100LED_N (TX/FX)/P2-SPEED-10LED_N
GPIO2
I/O
General purpose I/O signal
P1-SPEED-100LED_N (TX/FX)/P1-SPEED-10LED_N
GPIO1
I/O
General purpose I/O signal
P2-DUPLEX-LED_N
GPIO0
I/O
General purpose I/O signal
P1-DUPLEX-LED_N
Note: Primary and alternative functions for GPIO(31:0) are selected with the GPIO_PORT_MODE_H and
GPIO_PORT_MODE_L registers; primary and alternative functions for GPIO(44:32) are selected with
the configuration pins. In this table the I/O types are listed for the GPIO function.