SC9S12XS256J1MAA FREESCALE [Freescale Semiconductor, Inc], SC9S12XS256J1MAA Datasheet - Page 478
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SC9S12XS256J1MAA
Manufacturer Part Number
SC9S12XS256J1MAA
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.SC9S12XS256J1MAA.pdf
(736 pages)
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Timer Module (TIM16B8CV2) Block Description
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.
16.3.2.16 Pulse Accumulator Flag Register (PAFLG)
Read: Anytime
Write: Anytime
When the TFFCA bit in the TSCR register is set, any access to the PACNT register will clear all the flags
in the PAFLG register. Timer module or Pulse Accumulator must stay enabled (TEN=1 or PAEN=1) while
clearing these bits.
478
Module Base + 0x0021
Reset
W
R
0
0
7
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
Unimplemented or Reserved
0
0
1
1
0
0
1
1
Figure 16-25. Pulse Accumulator Flag Register (PAFLG)
0
0
6
PEDGE
CLK0
0
1
0
1
0
1
0
1
S12XS Family Reference Manual, Rev. 1.09
Table 16-19. Timer Clock Selection
0
0
5
Table 16-18. 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
16-30.
0
0
4
Timer Clock
Falling edge
Rising edge
Pin Action
0
0
3
0
0
2
PAOVF
Freescale Semiconductor
0
1
PAIF
0
0
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