MC9S12XD256MAL Datasheet, PDF (321/1348 Pages) Freescale Semiconductor, Inc – Freescale’s Scalable Controller Area Network

7.3.2.5 Timer Count Register (TCNT)
Chapter 7 Enhanced Capture Timer (S12ECT16B8CV2)
R
W
Reset
15
TCNT15
0
14
TCNT14
13
TCNT13
12
TCNT12
11
TCNT11
10
TCNT10
0
0
0
0
0
Figure 7-7. Timer Count Register High (TCNT)
9
TCNT9
0
8
TCNT8
0
R
W
Reset
7
TCNT7
0
6
TCNT6
5
TCNT5
4
TCNT4
3
TCNT3
2
TCNT2
0
0
0
0
0
Figure 7-8. Timer Count Register Low (TCNT)
1
TCNT1
0
0
TCNT0
0
Read: Anytime
Write: Has no meaning or effect
All bits reset to zero.
Table 7-6. TCNT Field Descriptions
Field
Description
15:0
TCNT[15:0]
Timer Counter Bits — The 16-bit main timer is an up counter. A read to this register will return the current value
of the counter. Access to the counter register will take place in one clock cycle.
Note: A separate read/write for high byte and low byte in test mode will give a different result than accessing them
as a word. 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.
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor
321