XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 452

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Timer Interface Module A (TIMA)
Technical Data
452
NOTE:
status and control register (TASC1) is unused. While the MS0B bit is set,
the channel 1 pin, PTE3/TACH1, is available as a general-purpose I/O
pin.
Channels 2 and 3 can be linked to form a buffered PWM channel whose
output appears on the PTF0/TACH2 pin. The TIMA channel registers of
the linked pair alternately control the pulse width of the output.
Setting the MS2B bit in TIMA channel 2 status and control register
(TASC2) links channel 2 and channel 3. The TIMA channel 2 registers
initially control the pulse width on the PTF0/TACH2 pin. Writing to the
TIMA channel 3 registers enables the TIMA channel 3 registers to
synchronously control the pulse width at the beginning of the next PWM
period. At each subsequent overflow, the TIMA channel registers (2 or
3) that control the pulse width are the ones written to last. TASC2
controls and monitors the buffered PWM 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 PWM channel whose
output appears on the PTF2 pin. The TIMA channel registers of the
linked pair alternately control the pulse width of the output.
Setting the MS4B bit in TIMA channel 4 status and control register
(TASC4) links channel 4 and channel 5. The TIMA channel 4 registers
initially control the pulse width on the PTF2 pin. Writing to the TIMA
channel 5 registers enables the TIMA channel 5 registers to
synchronously control the pulse width at the beginning of the next PWM
period. At each subsequent overflow, the TIMA channel registers (4 or
5) that control the pulse width are the ones written to last. TASC4
controls and monitors the buffered PWM 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.
In buffered PWM signal generation, do not write new pulse width 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 PWM signals.
Timer Interface Module A (TIMA)
MC68HC908AZ60A — Rev 2.0
MOTOROLA