MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 438
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MC9S12Q
Manufacturer Part Number
MC9S12Q
Description
Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S12Q.pdf
(644 pages)
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Chapter 15 Timer Module (TIM16B6C) Block Description
15.3.2.4
Read: Anytime
Write: Anytime
15.3.2.5
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.
438
Module Base + 0x0003
Module Base + 0x0004
Module Base + 0x0005
OC7D[7:2]
Reset
Reset
Reset
Field
7:2
W
W
W
R
R
R
TCNT15
OC7D7
TCNT7
Output Compare 7 Data — A channel 7 output compare can cause bits in the output compare 7 data register
to transfer to the timer port data register depending on the output compare 7 mask register.
Output Compare 7 Data Register (OC7D)
Timer Count Register (TCNT)
15
0
0
0
7
7
TCNT14
OC7D6
TCNT6
14
0
0
0
6
6
Figure 15-9. Output Compare 7 Data Register (OC7D)
Figure 15-10. Timer Count Register High (TCNTH)
Figure 15-11. Timer Count Register Low (TCNTL)
Table 15-4. OC7D Field Descriptions
TCNT13
OC7D5
TCNT5
13
0
0
0
5
5
MC9S12Q128
TCNT12
OC7D4
TCNT4
Rev 1.09
12
0
0
0
4
4
Description
TCNT11
OC7D3
TCNT3
11
0
0
0
3
3
TCNT10
OC7D2
TCNT2
10
0
0
0
2
2
TCNT9
TCNT1
Freescale Semiconductor
0
0
0
1
9
1
TCNT8
TCNT0
0
0
0
0
9
0
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