MC912DG128A Motorola, MC912DG128A Datasheet - Page 202

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

TCTL4 — Timer Control Register 4
TMSK1 — Timer Interrupt Mask 1
TCTL3 — Timer Control Register 3
Enhanced Capture Timer
MC68HC912DT128A Rev 2.0
202
RESET:
RESET:
RESET:
EDG3B
EDG7B
Bit 7
Bit 7
Bit 7
C7I
0
0
0
EDG3A
EDG7A
C6I
6
0
6
0
6
0
Read or write anytime.
EDGnB, EDGnA — Input Capture Edge Control
Read or write anytime.
The bits in TMSK1 correspond bit-for-bit with the bits in the TFLG1
status register. If cleared, the corresponding flag is disabled from
causing a hardware interrupt. If set, the corresponding flag is enabled to
cause a hardware interrupt.
Read or write anytime.
C7I–C0I — Input Capture/Output Compare “x” Interrupt Enable.
These eight pairs of control bits configure the input capture edge
detector circuits.
EDG6B
EDG2B
C5I
5
0
5
0
5
0
EDGnB
Enhanced Capture Timer
0
0
1
1
EDG6A
EDG2A
Table 2 Edge Detector Circuit Configuration
C4I
4
0
4
0
4
0
EDGnA
0
1
0
1
EDG5B
EDG1B
C3I
3
0
3
0
3
0
Capture disabled
Capture on rising edges only
Capture on falling edges only
Capture on any edge (rising or falling)
EDG5A
EDG1A
C2I
2
0
2
0
2
0
Configuration
EDG4B
EDG0B
C1I
1
0
1
0
1
0
EDG4A
EDG0A
Bit 0
Bit 0
Bit 0
C0I
0
0
0
MOTOROLA
$008B
$008C
$008A
16-ect