Spectrum Digital AppBox D21, User Manual

Page: 18 / 31

AppBox D21 System User’s Guide 18
AppBox
3.1.5.2 EXT2, AppIO Module Connector
The following table shows the signals present on the EXT2 connector.
EXT2, AppIO Module Connector
Pin # Signal Name Function Shared Functionality
1 Pin 2, JP2, VDD_5V if shorted
+5 volts to AppIO Module if
shorted
VDD_5V
2 DGND Ground Ground
3 PA10_ADC(P)
A/D converter, alternatively
positive part of differential ADC
4 PA11_ADC(N)
A/D converter, alternatively
negative part of differential ADC
5 PA20_GPIO General purpose I/O
6 PA21_GPIO General purpose I/O
7 PB12_PWM(P)
PWM, alternatively positive part of
differential PWM
8 PB13_PWM(N)
PWM, alternatively negative part
of differential PWM
9 PB14_IRQ/GPIO Interrupt request line and/or GPIO
10 PB15_SPI_SS_B/GPIO Slave select for SPI and/or GPIO
11 PA08_TWI_SDA
Data line for I
2
C interface, always
implemented, bus type
Pin 11 on EXT1, EXT3, Pin 5, U2
12 PA09_TWI_SCL
Clock line for I
2
C interface, always
implemented, bus type
Pin 12 on EXT1, EXT3, Pin 6, U3
13 PB11_UART_RX
Receiver line of target device
UART
Pin 13 on EXT1, EXT3
14 PA10_UART_TX
Transmitter line of target device
UART
Pin 14 on EXT1, EXT3
15 PB17_SPI_SS_A Slave select for SPI
16 PB18_SPI_MOSI
Master out slave out line of serial
peripheral interface, always
implemented, bus type
17 PA16_SPI_MISO
Master in slave out line of serial
peripheral interface, always
implemented, bus type
18 PB19_SPI_SCK
Clock for serial peripheral
interface, always implemented,
bus type
19 DGND Ground Ground
20 VDD_3V3 Power for the AppIO Module Power for the AppIO Module