Chapter 1 General Information 7
Programmable Timer/Counter•Counter chip: 82C54 or equivalent
•Counters: 3 channels, 16 bits, 2 channels are permanently
configured as programmable pacers; 1 channel is free
for user application
•Input, gate: TTL/CMOS compatible
•Time base:
Channel 1:10 MHz
Channel 2:Takes input from output of channel 1
Channel 0:Internal 1 MHz or external clock (10 MHz max.)
selected by software.
General:•I/O Connector: 68-pin SCSI-II female connector
•Power consumption: +5 V @ 850 mA (Typical),
+5 V @ 1.0 A (Max.)
•Dimensions: 175 mm x 107 mm (6.9” x 4.2”)
•Operating temperature: 0 ~ +60 °C (32 ~ 140 °F) ( refer to IEC 68-
2-1, 2 )
•Storage temperature: -20 ~ +70 °C (-4 ~ 158 °F)
•Operating humidity: 5 ~ 95%RH non-condensing ( refer to IEC 68-
2-3 )
•MTBF: over 64,770 hrs @ 25 °C, grounded, fixed environment