MC68HC12 Datasheet, PDF (267/478 Pages) Motorola, Inc – The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit

Enhanced Capture Timer
Timer Register Descriptions
PAxEN — 8-Bit Pulse Accumulator ‘x’ Enable
0 = 8-Bit Pulse Accumulator is disabled.
1 = 8-Bit Pulse Accumulator is enabled.
DLYCT — Delay Counter Control Register
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BIT 7
6
5
4
3
2
1
BIT 0
0
0
0
0
0
0
DLY1
DLY0
RESET:
0
0
0
0
0
0
0
0
Read or write any time.
If enabled, after detection of a valid edge on input capture pin, the delay
counter counts the pre-selected number of M clock (module clock)
cycles, then it will generate a pulse on its output. The pulse is generated
only if the level of input signal, after the preset delay, is the opposite of
the level before the transition.This will avoid reaction to narrow input
pulses.
After counting, the counter will be cleared automatically.
Delay between two active edges of the input signal period should be
longer than the selected counter delay.
DLYx — Delay Counter Select
DLY1
0
0
1
1
DLY0
0
1
0
1
Delay
Disabled (bypassed)
256M clock cycles
512M clock cycles
1024 M clock cycles
ICOVW — Input Control Overwrite Register
BIT 7
6
5
NOVW7 NOVW6 NOVW5
RESET:
0
0
0
4
NOVW4
0
3
NOVW3
0
2
NOVW2
0
1
NOVW1
0
BIT 0
NOVW0
0
Read or write any time.
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MC68HC912DT128A — Rev 4.0
MOTOROLA
Enhanced Capture Timer
Technical Data
267