8
2.2 CPU Setting for JUKI-752
•
CPU Speed Setting
The system clock is generated by the ICS650, and the different CPU clock
frequency can be selected by JP2 and shown as following table:
JP2 1-2
3-4
75MHz ON ON
100MHz
OFF
OFF
2.3 Watchdog Timer
Watchdog Timer is enabled by reading port 443H. It should be triggered before
the time-out period ends, otherwise it will assume the program operation is
abnormal and will issue a reset signal to start again, or activate NMI to CPU. The
Watchdog Timer is disables by reading port 843H. The Watchdog Timer time-out
period can be set 1,2,10,20,110 or 220 sec. by JP3.
•
JP4: Watchdog Active Type Setting
JP4 Description
2-3
RESET WHEN WDT TIME-OUT
1-2
ACTIVATE NMI TO CPU WHEN WDT TIME-OUT
OPEN DISABLE
WDT
•
JP3: WDT Time-out Period
JP3 1-2 3-4 5-6 7-8
1
sec OFF OFF ON OFF
2 sec
OFF
OFF
ON
ON
10 sec
OFF
ON
OFF
OFF
20
sec
OFF ON OFF ON
110 sec
ON
OFF
OFF
OFF
220 sec
ON OFF OFF ON
2.4 DiskOnChip™ Flash Disk
DiskOnChip™ Flash Disk Chip (DOC) is produced by M-Systems. The DOC (MD-
2200-xMB) is 32-pin DIP package. Because the DOC is 100% compatible to hard
disk and DOS, extra software utility is not necessary. It is just “plug and play”,
easy and reliable.
•
JP7: DiskOnChip™ Memory Address Setting
JP7 Description
1-2 CE00H
3-4
D600H
5-6 DE00H
