Digi NS7520B-1-C36 Hardware Reference Manual page 73

GEN Module
C H A P T E R
The GEN module provides the NS7520 with its main system control functions, as well
as the following:
Two programmable timers with interrupt
One programmable bus-error timer
One programmable watchdog timer
Two 8-bit programmable general-purpose I/O ports
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G E N M o d u l e
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