mc68hc908kx8 Freescale Semiconductor, Inc, mc68hc908kx8 Datasheet - Page 165

• Manufacturer Part Number: mc68hc908kx8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

15.8.3 TIM Counter Modulo Registers
The read/write TIM modulo registers (TMODH and TMODL) contain the modulo value for the TIM counter.
When the TIM counter reaches the modulo value, the overflow flag (TOF) becomes set, and the TIM
counter resumes counting from $0000 at the next timer clock. Writing to the high byte (TMODH) inhibits
the TOF bit and overflow interrupts until the low byte (TMODL) is written. Reset sets the TIM counter
modulo registers.
15.8.4 TIM Channel Status and Control Registers
Each of the TIM channel status and control registers (TSC0 and TSC1):
Freescale Semiconductor
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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 TIM overflow
Selects 0 percent and100 percent PWM duty cycle
Selects buffered or unbuffered output compare/PWM operation
Register name and address:
Register name and address:
Register name and address:
Register name and address:
Figure 15-8. TIM Channel Status and Control Registers (TSCO and TSC1)
Reset the TIM counter before writing to the TIM counter modulo registers.
Reset:
Reset:
Read:
Read:
Write:
Write:
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 15-7. TIM Counter Modulo Registers (TMODH and TMODL)
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
CH0F
CH1F
Bit 7
Bit 7
Bit 15
0
0
0
0
Bit 7
Bit 7
Bit 7
1
1
= Unimplemented
CH0IE
CH1IE
TMODH — $0023
TMODL — $0024
TSC0 — $0025
6
0
TSC1 — $0028
6
0
14
6
1
6
6
1
MS0B
5
0
5
0
0
13
5
1
5
5
1
NOTE
MS0A
MS1A
4
0
4
0
12
4
1
4
4
1
ELS0B
ELS1B
3
0
3
0
11
3
1
3
3
1
ELS0A
ELS1A
2
0
2
0
10
2
1
2
2
1
TOV0
TOV1
1
0
1
0
1
9
1
1
1
1
CH0MAX
CH1MAX
Bit 0
Bit 0
Bit 0
Bit 8
Bit 0
Bit 0
0
0
1
1
I/O Registers
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