mc68hc908mr32 Freescale Semiconductor, Inc, mc68hc908mr32 Datasheet - Page 228

• Manufacturer Part Number: mc68hc908mr32
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Timer Interface A (TIMA)
16.7.3 TIMA Counter Modulo Registers
The read/write TIMA modulo registers contain the modulo value for the TIMA counter. When the TIMA
counter reaches the modulo value, the overflow flag (TOF) becomes set, and the TIMA counter resumes
counting from $0000 at the next timer clock. Writing to the high byte (TAMODH) inhibits the TOF bit and
overflow interrupts until the low byte (TAMODL) is written. Reset sets the TIMA counter modulo registers.
16.7.4 TIMA Channel Status and Control Registers
Each of the TIMA channel status and control registers:
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Flags input captures and output compares
Enables input capture and output compare interrupts
Selects input capture, output compare, or PWM operation
Selects high, low, or toggling output on output compare
Selects rising edge, falling edge, or any edge as the active input capture trigger
Selects output toggling on TIMA overflow
Selects 0 percent and 100 percent PWM duty cycle
Selects buffered or unbuffered output compare/PWM operation
Register Name and Address:
Register Name and Address:
Reset:
Reset:
Reset the TIMA counter before writing to the TIMA counter modulo registers.
Read:
Read:
Write:
Write:
Bit 15
Bit 7
Bit 7
Bit 7
1
1
MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1
Figure 16-7. TIMA Counter Modulo Registers
Bit 14
Bit 6
6
1
6
1
(TAMODH and TAMODL)
TAMODH — $0011
TAMODL — $0012
Bit 13
Bit 5
5
1
5
1
NOTE
Bit 12
Bit 4
4
1
4
1
Bit 11
Bit 3
3
1
3
1
Bit 10
Bit 2
2
1
2
1
Bit 9
Bit 1
1
1
1
1
Freescale Semiconductor
Bit 0
Bit 8
Bit 0
Bit 0
1
1