MC68HC08AZ60A Datasheet, PDF (411/480 Pages) Motorola, Inc – Microcontrollers

Timer Interface Module A (TIMA)
Functional Description
Channels 2 and 3 can be linked to form a buffered output compare
channel whose output appears on the PTF0/TACH2 pin. The TIMA
channel registers of the linked pair alternately control the output.
Setting the MS2B bit in TIMA channel 2 status and control register
(TASC2) links channel 2 and channel 3. The output compare value in the
TIMA channel 2 registers initially controls the output on the
PTF0/TACH2 pin. Writing to the TIMA channel 3 registers enables the
TIMA channel 3 registers to synchronously control the output after the
TIMA overflows. At each subsequent overflow, the TIMA channel
registers (2 or 3) that control the output are the ones written to last.
TASC2 controls and monitors the buffered output compare function, and
TIMA channel 3 status and control register (TASC3) is unused. While the
MS2B bit is set, the channel 3 pin, PTF1/TACH3, is available as a
general-purpose I/O pin.
Channels 4 and 5 can be linked to form a buffered output compare
channel whose output appears on the PTF2 pin. The TIMA channel
registers of the linked pair alternately control the output.
Setting the MS4B bit in TIMA channel 4 status and control register
(TASC4) links channel 4 and channel 5. The output compare value in the
TIMA channel 4 registers initially controls the output on the PTF2 pin.
Writing to the TIMA channel 5 registers enables the TIMA channel 5
registers to synchronously control the output after the TIMA overflows.
At each subsequent overflow, the TIMA channel registers (4 or 5) that
control the output are the ones written to last. TASC4 controls and
monitors the buffered output compare function and TIMA channel 5
status and control register (TASC5) is unused. While the MS4B bit is set,
the channel 5 pin, PTF3, is available as a general-purpose I/O pin.
NOTE:
In buffered output compare operation, do not write new output compare
values to the currently active channel registers. User software should
track the currently active channel to prevent writing a new value to the
active channel. Writing to the active channel registers is the same as
generating unbuffered output compares.
MC68HC08AZ60A — Rev 0.0
MOTOROLA
Timer Interface Module A (TIMA)
Advance Information
411