protech ProX-1640, User Manual, Page: 27 / 113

Chapter 2 Hardware Configuration
Page: 2-16
Prox-1640 USER
′
S MANUAL
2-20. IRDA CONNECTOR
IRDA1 : IrDA (Infrared) Connector
The pin assignments are as follows:
PIN ASSIGNMENT
1 VCC
2 NC
3 IRRX
4 GND
5 IRTX
2-21. RESET/NMI/CLEAR WATCHDOG SELECTION
JP7 : Reset/NMI/Clear Watchdog Selection
The selections are as follows:
FUNCTION
JUMPER SETTING
(pin closed)
JUMPER
ILLUSTRATION
RESET
1-2
JP7
6 5
1 2
NMI
3-4
JP7
6 5
1 2
CLEAR WATCHDOG
5-6
JP7
6 5
1 2
***Manufacturing Default is set as NMI.
User may select to use the Reset or NMI watchdog. NMI, also known as Non-
Maskable Interrupt, is used for serious conditions that demand the processor’s
immediate attention, it cannot be ignored by the system unless it is shut off
specifically. To clear NMI command, user should short the “Clear Watchdog”
pin via push button.
IRDA1
1