MC9S12E32CFU FREESCALE [Freescale Semiconductor, Inc], MC9S12E32CFU Datasheet - Page 424
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MC9S12E32CFU
Manufacturer Part Number
MC9S12E32CFU
Description
HCS12 Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S12E32CFU.pdf
(606 pages)
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Chapter 13 Timer Module (TIM16B4CV1)
The 16-bit main timer is an up counter.
A full access for the counter register should take place in one clock cycle. A separate read/write for high
byte and low byte will give a different result than accessing them as a word.
Read: Anytime
Write: Has no meaning or effect in the normal mode; only writable in special modes (test_mode = 1).
The period of the first count after a write to the TCNT registers may be a different size because the write
is not synchronized with the prescaler clock.
13.3.2.6
Read: Anytime
Write: Anytime
424
Reset
Reset
TSWAI
Field
TEN
7
6
W
W
R
R
TCNT7
TEN
Timer Enable
0 Disables the main timer, including the counter. Can be used for reducing power consumption.
1 Allows the timer to function normally.
If for any reason the timer is not active, there is no 64 clock for the pulse accumulator because the 64 is
generated by the timer prescaler.
Timer Module Stops While in Wait
0 Allows the timer module to continue running during wait.
1 Disables the timer module when the MCU is in the wait mode. Timer interrupts cannot be used to get the MCU
TSWAI also affects pulse accumulator.
Timer System Control Register 1 (TSCR1)
0
0
7
7
out of wait.
= Unimplemented or Reserved
TCNT6
TSWAI
Figure 13-12. Timer System Control Register 1 (TSCR2)
0
0
6
6
Figure 13-11. Timer Count Register Low (TCNTL)
Table 13-6. TSCR1 Field Descriptions
TCNT5
TSFRZ
MC9S12E128 Data Sheet, Rev. 1.07
0
0
5
5
TCNT4
TFFCA
0
0
4
4
Description
TCNT3
0
0
0
3
3
TCNT2
0
0
0
2
2
TCNT1
Freescale Semiconductor
0
0
0
1
1
TCNT0
0
0
0
0
0
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