Freescale Semiconductor, Inc.
Enhanced Capture Timer
Timer Registers
Bit 7
OC7D7
0
6
OC7D6
0
5
OC7D5
0
4
OC7D4
0
3
OC7D3
0
2
OC7D2
0
1
OC7D1
0
Bit 0
OC7D0
0
RESET:
OC7D — Output Compare 7 Data Register
$0083
Read or write anytime.
The bits of OC7D correspond bit-for-bit with the bits of timer port
(PORTT). When a successful OC7 compare occurs, for each bit that is
set in OC7M, the corresponding data bit in OC7D is stored to the
corresponding bit of the timer port.
When the OC7Mn bit is set, a successful OC7 action will override a
successful OC[6:0] compare action during the same cycle; therefore, the
OCn action taken will depend on the corresponding OC7D bit.
Bit 7
Bit 15
Bit 7
0
6
14
6
5
13
5
4
12
4
3
11
3
2
10
2
1
9
1
0
Bit 0
Bit 8
Bit 0
0
RESET:
0
0
0
0
0
TCNT — Timer Count Register
$0084–$0085
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 (SMODN = 0).
MC68HC912DG128 — Rev 3.0
Technical Data
Enhanced Capture Timer
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