Quick Start Guide for TWRPI-MMA845xQ
Quick Start Guide
8
Jumper Description
J2
Potentiometer enable
Closing this jumper connects the potentiometer signal to an ADC channel
J8
Switch 1 enable
Closing this jumper connects the SW to the MCU
J10
Switch 2 enable
Closing this jumper connects the SW to the MCU
J11
Switch supply selector
Pins 1-2 closed: Switches connect to GND when pressed
Pins 2-3 closed: Switches connect to 5 V when pressed
J12
Switch pull direction selector
Pins 1-2 closed: Switches have pull-down resistors
Pins 2-3 closed: Switches have pull-up resistors
J14
Switch 3 enable
Closing this jumper connects the SW to the MCU
J15
Switch 4 enable
Closing this jumper connects the SW to the MCU
J16
VDDX ballast transistor to VDDX
Closing this jumper connects the VDDX ballast transistor output to the VDDX power bus
J17
Connect VDDX to VDDA
Closing this jumper connects VDDX to VDDA
J18
Connect VSUP to VBATT
Closing this jumper connects the 12 V input (VBATT) to the MCU (VSUP)
J19
SPLIT
Closing this jumper connects the SPLIT pin to the CAN bus
J20
Connect VDDX to VDDM
Closing this jumper connects VDDX to VDDM
J22
Connect VDDX to VDD5V
Closing this jumper connects VDDX to VDD5V (5 V power supply to other on-board peripherals)
J24
CAN termination
Closing this jumper connects the CAN termination resistors to the CAN bus
Jumper Description
J26
Connect VDDX to VLCD
Closing this jumper connects VDDX to VLCD
J28
VDDC ballast transistor to VDDC
Closing this jumper connects the VDDC ballast transistor output to the VDDC power bus
J33
Speaker power
Closing this jumper powers the speaker amplification circuit
J34
LED PP3 enable
Closing this jumper connects the LED to the MCU
J35
Speaker amplitude control selector
Pins 1-2 closed: Speaker amplitude controlled by SGA pin
Pins 2-3 closed: Speaker amplitude is fixed to 5 V (volume is controlled by SGT pin)
J36
SCI transceiver power
Closing this jumper powers the SCI transceiver circuit
J37
SCI TX Selector
Pins 1-2 closed: MCU SCI TX pin is connected to the virtual SCI module (via OSBDM)
Pins 2-3 closed: MCU SCI TX pin is connected to SCI transceiver
J38
SCI RX Selector
Pins 1-2 closed: MCU SCI RX pin is connected to SCI transceiver
Pins 2-3 closed: MCU SCI RX pin is connected to the virtual SCI module (via OSBDM)
J39
LED PP2 enable
Closing this jumper connects the LED to the MCU
J40
OSBDM operating mode selector
Pins 1-2 open: OSBDM in normal mode, programming and debugging capable
Pins 1-2 closed: OSBDM on bootloader mode, only used for firmware update
J41
Speaker tone control enable
Closing this jumper connects speaker amplifier to the MCU
J42
LED PP1 enable
Closing this jumper connects the LED to the MCU
J43
LIN transceiver power
Closing this jumper powers the LIN transceiver
J44
LED PP0 enable
Closing this jumper connects the LED to the MCU
Jumper List and Description
Jumper List and Description, cont.
TRK-S12ZVH128
9
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