mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 429
mc9s12e256
Manufacturer Part Number
mc9s12e256
Description
Hcs12 Microcontrollers 16-bit Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12E256.pdf
(602 pages)
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For the description of PACLK please refer
If the pulse accumulator is disabled (PAEN = 0), the prescaler clock from the timer is always used as an
input clock to the timer counter. The change from one selected clock to the other happens immediately
after these bits are written.
Freescale Semiconductor
If the timer is not active (TEN = 0 in TSCR), there is no divide-by-64
because the 64 clock is generated by the timer prescaler.
PAMOD
CLK1
0
0
1
1
0
0
1
1
PEDGE
CLK0
0
1
0
1
0
1
0
1
Table 13-19. Timer Clock Selection
MC9S12E256 Data Sheet, Rev. 1.08
Table 13-18. Pin Action
Use PACLK/65536 as timer counter clock frequency
Use PACLK/256 as timer counter clock frequency
Figure
Use timer prescaler clock as timer counter clock
Div. by 64 clock enabled with pin high level
Use PACLK as input to timer counter clock
Div. by 64 clock enabled with pin low level
NOTE
13-22.
Timer Clock
Falling edge
Rising edge
Pin Action
Chapter 13 Timer Module (TIM16B4CV1)
429
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