Specifications

Counter/Timers
OVERVIEW
This chapter describes the Counter/Timer Control Unit (TCU) and
provides register descriptions.
The TCU includes three 16-bit programmable counter/timers.
Applications for the counter/timers include baud rate generation for
the serial controller, timing loops, timed and periodic interrupts, and
asynchronous event counters.
The main features of the TCU are:
• Three 16-bit counter/timers
• Six programmable operating modes
• Binary and BCD counting
• Interrupt and polled operation
• Functionally equivalent to 8254
7-2