TMS370CX32_09 Datasheet, PDF (19/44 Pages) Texas Instruments – 8-BIT MICROCONTROLLER

TMS370Cx32
8-BIT MICROCONTROLLER
SPNS015C – FEBRUARY 1990 – REVISED FEBRUARY 1997
programmable acquisition and control timer (PACT) module (continued)
The PACT module features include the following:
D Input-capture functions on up to six input pins (CP1 to CP6), depending on the mode selected:
– Mode A: CP1–2 are dedicated capture, CP3–6 are circular-buffer capture, and CP6 is an event pin.
– Mode B: CP1–4 are dedicated capture, CP5–6 are circular-buffer capture, and CP6 is an event pin.
D Multiple timer-driven outputs on eight pins (OP1 to OP8)
– Standard compare command: sets or clears an output pin whenever the timer/counter is equal to a
certain value
– Virtual timers: Enable variations of the PWM’s period and provides periodic interrupts to the processor.
– Double event-compare command: Comparisons of the 8-bit event counter with two event-compare
values and the actions that can be performed are based on each value.
– Event-compare 1 matching the event counter: sets or resets the selected output pin (OP1–OP8),
generates interrupt, and generates a 32-bit capture into the circular buffer.
– Event-compare 2 matching the event counter: sets or resets the selected output pin (OP1–OP8),
generates interrupt, generates a 32-bit capture into the circular buffer, and resets the 20-bit default
timer.
– Offset timer definition-time from last event:
– Generates an interrupt when the maximum event count is reached
– Stores the 16-bit virtual timer in the circular buffer on each event
– Stores the 20-bit default timer and 8-bit event counter in the circular buffer when the maximum
event count is reached
– Resets the 20-bit hardware default timer when the maximum event count is reached
– Conditional-compare command has a timer-compare value and an event-compare value.
– Generates an interrupt when the event-compare value equals the event counter and the
timer-compare value equals the last defined timer
– Sets or clears one of the seven output pins (OP1–OP7) when the event compare value equals the
event counter and the timer-compare value equals the last defined timer
– Baud rate timer definition: runs the mini-serial communications port built into the PACT module.
D Configurable timer overflow rates
D One 8-bit event counter driven by CP6
D Up to 20-bit timer capability
D Interaction between event counter and timer activity
D Register-based organization allowing direct access to timer parameters by the CPU
D 18 independent interrupt vectors with two priority levels
D Integrated, configurable watchdog with selectable time-out period
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