TWR-KV31F120M Tower Module, User’s Guide, Rev. 0, 03/2014
8
Freescale Semiconductor Inc.
Hardware description
6.6
Potentiometer, pushbuttons, and LEDs
The TWR-KV31F120M also features:
•
A potentiometer connected to an ADC input signal (ADC0_SE23).
•
Four pushbutton switches
•
SW1-PTC6/LLWU_P10, SW2-PTC11/LLWU_P11, SW3-PTA4/LLWU_P3, SW4-PTE25.
•
Four user-controllable LEDs connected to GPIO signals (optionally isolated using jumpers):
— Yellow LED (D3) to PTE1
— Red LED (D4) to PTE0
— Orange LED (D6) to PTB19
— Green LED (D7) to PTD7
•
RGB LED
6.7
General Purpose Tower Plug-in (TWRPI) socket
The TWR-KV31F120M features a socket (J6 and J7) that can accept a variety of different Tower Plug-in
modules featuring sensors, RF transceivers, and other peripherals. The General Purpose TWRPI socket
provides access to I2C, SPI, IRQs, GPIOs, timers, analog conversion signals, TWRPI ID signals, reset,
and voltage supplies. The pinout for the TWRPI Socket is defined in
Table 3
.
Table 3. General purpose TWRPI socket pinout
J6
J5
Pin
Description
Pin
Description
1
5 V VCC
1
GND
2
3.3 V VCC
2
GND
3
GND
3
I2C: SCL
4
3.3 V VDDA
4
I2C: SDA
5
VSS (Analog GND)
5
GND
6
VSS (Analog GND)
6
GND
7
VSS (Analog GND)
7
GND
8
ADC: Analog 0
8
GND
9
ADC: Analog 1
9
SPI:MISO
10
VSS (Analog GND)
10
SPI:MOSI
11
VSS (Analog GND)
11
SPI:SS
