STA8088FG Pin description
Doc ID 022731 Rev 3 11/17
2.8 Port 1 pins
Port 1 consists of a 32-bit bidirectional I/O port (only9-bit are used in STA8088FG).
It can be either used as general purpose Input or Output port, or configured according to the
associated alternate functions.
Table 5. Port 0 pins
Symbol I/O voltage I/O Mode Functions VFQFPN56
P0.0 VDD_IOR1
IO Default GPIO.0: General Purpose IO
35
I A PPS_IN: Pulse Per Second Input
O B PPS_OUT: Pulse Per Second Output
O C SSP_CSN: SSP Chip Select Active Low
P0.8 VDD_IOR5
O Default CAN1TX
(1)
: CAN1 Transmit Data Output
55IO A GPIO.8: General Purpose IO
IO B I2C_SD: I2C Serial Data
P0.9 VDD_IOR5
I Default CAN1RX
(1)
: CAN 1 Receive Data Input
1IO A GPIO.9: General Purpose IO
O B I2C_SCLK: I2C Clock
1. Only for STA8088FGB (see Figure 5: Ordering information scheme).
Table 6. Port 1 pins
Symbol I/O Voltage I/O Mode Functions VFQFPN56
P1.0 VDD_IOR1
O Default
SSP_CSN/IOPWRSEL_R1: SSP chip select active
low / I/O Ring 1 power selection
40
I/O A GPIO32: general purpose I/O
I/O B SIGNGGPS: GGPS 3-bit coding output (sign)
O C SQI_CEN: SQI Flash chip enable
P1.1 VDD_IOR1
I/O Default SSP_CLK: SSP clock
41
I/O A GPIO33: general purpose I/O
I/O B CLOCK_GGPS: GGPS clock out
O C SQI_CLK: SQI Flash clock
P1.2 VDD_IOR1
I Default SSP_DI: SSP serial data input
42
I/O A GPIO34: general purpose I/O
I/O B SIGNGNS: GNS 3-bit coding output (sign)
IO C SQI_SIO0/SI: SQI Flash data I/O 0 / serial I
