Gpio pins
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This document describes the pin functionality selection registers and pin function select registers for a microcontroller. It provides information on configuring individual pin functions, such as selecting whether a pin acts as a general purpose I/O, UART, I2C, timer/counter, analog input, etc. It also lists the pin mappings and functions for ports P0 and P1 of the microcontroller.
![ 13:12 (30) P0.6 00 GPIO Port 0.6 0
01 MOSI0 (SPI0)
10 Capture 0.2 (Timer 0)
11 Reserved[1][2]
or AD1.0[3]
15:14 (31) P0.7 00 GPIO Port 0.7
01 SSEL0 (SPI0)
10 PWM2
11 EINT2](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-9-320.jpg)
![ 17:16 (33) P0.8 00 GPIO Port 0.8
01 TXD UART1
10 PWM4
11 Reserved[1][2]
or AD1.1[3]
19:18 (34) P0.9 00 GPIO Port 0.9
01 RxD (UART1)
10 PWM6
11 EINT3](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-10-320.jpg)
![ 21:20 (35) P0.10 00 GPIO Port 0.10
01 Reserved[1][2] or RTS
(UART1)[3]
10 Capture 1.0 (Timer 1)
11 Reserved[1][2]
orAD1.2[3]
23:22 (37) P0.11 00 GPIO Port 0.11
01 Reserved[1][2] or CTS
(UART1)[3]
10 Capture 1.1 (Timer 1)
11 SCL1 (I2C1)](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-11-320.jpg)
![ 25:24 (38) P0.12 00 GPIO Port
0.12 0
01 Reserved[1][2] or DSR
(UART1)[3]
10 Match 1.0 (Timer 1)
11 Reserved[1][2]
or AD1.3[3]
27:26 (39) P0.13 00 GPIO Port 0.13 0
01 Reserved[1][2] or DTR
(UART1)[3]
10 Match 1.1 (Timer 1)
11 Reserved[1][2]
orAD1.4[3]](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-12-320.jpg)
![ 29:28 (41) P0.14 00 GPIO Port 0.14 0
01 Reserved[1][2] or DCD
(UART1)[3]
10 EINT1
11 SDA1 (I2C1)
31:30 (45) P0.15 00 GPIO Port 0.15 0
01 Reserved[1][2] or RI
(UART1)[3]
10 EINT2
11 Reserved[1][2]
orAD1.5[3]](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-13-320.jpg)
![ 29:28 P0.14 00 GPIO Port 0.14 0
01 Reserved[1][2] or DCD
(UART1)[3]
10 EINT1
11 SDA1 (I2C1)
31:30 P0.15 00 GPIO Port 0.15 0
01 Reserved[1][2] or RI
(UART1)[3]
10 EINT2
11 Reserved[1][2]
orAD1.5[3]](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-14-320.jpg)
![ 9:8 (55) P0.20 00 GPIO Port 0.20 0
01 Match 1.3 (Timer 1)
10 SSEL1 (SSP)
11 EINT3
11:10(1) P0.21 00 GPIO Port 0.21 0
01 PWM5
10 Reserved[1][2] or
AD1.6[3]
11 Capture 1.3 (Timer 1)](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-17-320.jpg)
![ 13:12 (2) P0.22 00 GPIO Port 0.22 0
01 Reserved[1][2] or
AD1.7[3]
10 Capture 0.0 (Timer 0)
11 Match 0.0 (Timer 0)
15:14 P0.23 00 GPIO Port 0.23 0
01 VBUS
10 Reserved
11 Reserved](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-18-320.jpg)
![ 17:16 P0.24 00 Reserved
01 Reserved
10 Reserved
11 Reserved
19:18(9) P0.25 00 GPIO Port 0.25 0
01 AD0.4
10 Reserved[1] or
Aout(DAC)[2][3]
11 Reserved](https://image.slidesharecdn.com/gpiopins-130212035947-phpapp01/85/Gpio-pins-19-320.jpg)
Gpio pins
- 5. FUNCTIONALITY OF PINS PINSEL0 Pin function select Read/Write 0x0000 0000 PINSEL1 Pin function select Read/Write 0x0000 0000 PINSEL2 Pin function select Read/Write 0x0000 0000
- 6. PIN FUNCTION SELECT REGISTER 0 (Pin of Select Port Pin sélection Function Résister) line 1:0 (19) P0.0 00 GPIO Port 0.0 01 TXD (UART0) 10 PWM1 11 Reserved 3:2 (21) P0.1 00 GPIO Port 0.1 01 RxD (UART0) 10 PWM3 11 EINT0
- 7. 5:4 (22) P0.2 00 GPIO Port 0.2 01 SCL0 (I2C0) 10 Capture 0.0 (Timer 0) 11 Reserved 7:6 (26) P0.3 00 GPIO Port 0.3 01 SDA0 (I2C0) 10 Match 0.0 (Timer 0) 11 EINT1
- 8. 9:8 (27) P0.4 00 GPIO Port 0.4 0 01 SCK0 (SPI0) 10 Capture 0.1 (Timer 0) 11 AD0.6 11:10 (29) P0.5 00 GPIO Port 0.5 0 01 MISO0 (SPI0) 10 Match 0.1 (Timer 0) 11 AD0.7
- 9. 13:12 (30) P0.6 00 GPIO Port 0.6 0 01 MOSI0 (SPI0) 10 Capture 0.2 (Timer 0) 11 Reserved[1][2] or AD1.0[3] 15:14 (31) P0.7 00 GPIO Port 0.7 01 SSEL0 (SPI0) 10 PWM2 11 EINT2
- 10. 17:16 (33) P0.8 00 GPIO Port 0.8 01 TXD UART1 10 PWM4 11 Reserved[1][2] or AD1.1[3] 19:18 (34) P0.9 00 GPIO Port 0.9 01 RxD (UART1) 10 PWM6 11 EINT3
- 11. 21:20 (35) P0.10 00 GPIO Port 0.10 01 Reserved[1][2] or RTS (UART1)[3] 10 Capture 1.0 (Timer 1) 11 Reserved[1][2] orAD1.2[3] 23:22 (37) P0.11 00 GPIO Port 0.11 01 Reserved[1][2] or CTS (UART1)[3] 10 Capture 1.1 (Timer 1) 11 SCL1 (I2C1)
- 12. 25:24 (38) P0.12 00 GPIO Port 0.12 0 01 Reserved[1][2] or DSR (UART1)[3] 10 Match 1.0 (Timer 1) 11 Reserved[1][2] or AD1.3[3] 27:26 (39) P0.13 00 GPIO Port 0.13 0 01 Reserved[1][2] or DTR (UART1)[3] 10 Match 1.1 (Timer 1) 11 Reserved[1][2] orAD1.4[3]
- 13. 29:28 (41) P0.14 00 GPIO Port 0.14 0 01 Reserved[1][2] or DCD (UART1)[3] 10 EINT1 11 SDA1 (I2C1) 31:30 (45) P0.15 00 GPIO Port 0.15 0 01 Reserved[1][2] or RI (UART1)[3] 10 EINT2 11 Reserved[1][2] orAD1.5[3]
- 14. 29:28 P0.14 00 GPIO Port 0.14 0 01 Reserved[1][2] or DCD (UART1)[3] 10 EINT1 11 SDA1 (I2C1) 31:30 P0.15 00 GPIO Port 0.15 0 01 Reserved[1][2] or RI (UART1)[3] 10 EINT2 11 Reserved[1][2] orAD1.5[3]
- 15. PIN FUNCTION SELECT REGISTER 1 1:0 (46) P0.16 00 GPIO Port 0.16 0 01 EINT0 10 Match 0.2 (Timer 0) 11 Capture 0.2 (Timer 0) 3:2 (47) P0.17 00 GPIO Port 0.15 0 01 Capture 1.2 (Timer 1) 10 SCK1 (SSP) 11 Match 1.2 (Timer 1)
- 16. 5:4(53) P0.18 00 GPIO Port 0.18 0 01 Capture 1.3 (Timer 1) 10 Match 0.2 (Timer 0) 11 MISO1 (SSP) 7:6 (54) P0.19 00 GPIO Port 0.19 0 01 Match 1.2 (Timer 1) 10 MOSI1 (SSP) 11 Capture 1.2 (Timer 1)
- 17. 9:8 (55) P0.20 00 GPIO Port 0.20 0 01 Match 1.3 (Timer 1) 10 SSEL1 (SSP) 11 EINT3 11:10(1) P0.21 00 GPIO Port 0.21 0 01 PWM5 10 Reserved[1][2] or AD1.6[3] 11 Capture 1.3 (Timer 1)
- 18. 13:12 (2) P0.22 00 GPIO Port 0.22 0 01 Reserved[1][2] or AD1.7[3] 10 Capture 0.0 (Timer 0) 11 Match 0.0 (Timer 0) 15:14 P0.23 00 GPIO Port 0.23 0 01 VBUS 10 Reserved 11 Reserved
- 19. 17:16 P0.24 00 Reserved 01 Reserved 10 Reserved 11 Reserved 19:18(9) P0.25 00 GPIO Port 0.25 0 01 AD0.4 10 Reserved[1] or Aout(DAC)[2][3] 11 Reserved
- 20. 21:20 P0.26 00 Reserved 01 Reserved 10 Reserved 11 Reserved 23:22 P0.27 00 Reserved 01 Reserved 10 Reserved 11 Reserved
- 21. 25:24(13) P0.28 00 GPIO Port 0.28 01 AD0.1 10 Capture 0.2 (Timer 0) 11 Match 0.2 (Timer 0) 27:26(14) P0.29 00 GPIO Port 0.29 01 AD0.2 10 Capture 0.3 (Timer 0) 11 Match 0.3 (Timer 0)
- 22. 29:28(15) P0.30 00 GPIO Port 0.30 01 AD0.3 10 EINT3 11 Capture 0.0 (Timer 0) 31:30(17) P0.31 00 GPO Port only 01 UP_LED 10 CONNECT 11 Reserved
- 23. PIN FUNCTION SELECT REGISTER 2
- 24. FUNCTION PIN TYPE & DESCRIPTION D+ 10 INPUT/OUTPUT(USB bidirectional D+ line) D- 11 INPUT/OUTPUT(USB bidirectional D- line) XTAL1 62 INPUT(Input to the oscillator circuit and internal clock generator circuits) XTAL2 61 OUTPUT(Output from the oscillator amplifier) RTXC1 3 INPUT(Input to the RTC oscillator circuit) RTXC2 5 OUTPUT(output to the RTC oscillator circuit) VSS 6, 18, INPUT ( Ground: 0 V reference) 25,42,50 VSSA 52 INPUT(Analog Ground: 0 V reference) VDD 23, 43, 51 INPUT(power supply)
- 25. VDDA 7 INPUT(analog power supply) VREF 63 INPUT(A/D Converter Reference) VBAT 49 INPUT(RTC power supply)
- 27. FAST GPIO REGISTER MAP