5. Each Component Function
User’s Manual
71
RAS Functions
A RAS port is provided. This port offers watchdog timer, remote reset, and general-purpose I/O RAS
functions.
Table 5.14. RAS Connector
Signal name
SPK
GND
TX +
TX -
RX +
RX -
NCOM
PO2/WDT
PO0
PO1
NCOM
PI1
PI2/IRQ
PCOM
PI0
Connector type
Pin No.
1
9
2
10
3
11
4
12
5
13
6
7
14
8
15
Function
External speaker signal
External speaker ground
RS-485 transmitting line
RS-485 receiving line
Minus common dedicated to PO2
General-purpose output or watchdog timer alarm output
General-purpose output
General-purpose output minus common
General-purpose input
General-purpose input or interrupt input
General-purpose input plus common
General-purpose input
15pin D-SUB(FEMALE) (DALC-J15SAF-20L9) JAE
*Fastening screw: No. 4-40UNC inch thread
8
1
9
15
RAS Port address: 4000h to 4006h
CAUTION
Pin 4 NCOM (minus common dedicated to PO2) and pin 6 NCOM (minus common shared by PO0
and PO1) are electrically separated from each other.