MC68711E20CFNE3 Datasheet, PDF (132/242 Pages) –

Timing Systems
input capture register pair inhibits a new capture transfer for one bus cycle. If a double-byte read
instruction, such as load double accumulator D (LDD), is used to read the captured value, coherency is
assured. When a new input capture occurs immediately after a high-order byte read, transfer is delayed
for an additional cycle but the value is not lost.
Register name: Timer Input Capture 1 Register (High) Address: $1010
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Write:
Reset:
Indeterminate after reset
Register name: Timer Input Capture 1 Register (Low) Address: $1011
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
Figure 9-4. Timer Input Capture 1 Register Pair (TIC1)
Register name: Timer Input Capture 2 Register (High) Address: $1012
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Write:
Reset:
Indeterminate after reset
Register name: Timer Input Capture 2 Register (Low) Address: $1013
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
Figure 9-5. Timer Input Capture 2 Register Pair (TIC2)
Register name: Timer Input Capture 3 Register (High) Address: $1014
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Write:
Reset:
Indeterminate after reset
Register name: Timer Input Capture 3 Register (Low) Address: $1015
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Write:
Reset:
Indeterminate after reset
Figure 9-6. Timer Input Capture 3 Register Pair (TIC3)
M68HC11E Family Data Sheet, Rev. 5.1
132
Freescale Semiconductor