TMS370 datasheet(19/43 Pages) TI

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TMS370Cx32

8-BIT MICROCONTROLLER

SPNS015C – FEBRUARY 1990 – REVISED FEBRUARY 1997

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251–1443

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

TMS370 Datasheet(PDF) 19 Page - Texas Instruments

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