mc68hc912bc32 Freescale Semiconductor, Inc, mc68hc912bc32 Datasheet - Page 170

• Manufacturer Part Number: mc68hc912bc32
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Enhanced Capture Timer (ECT) Module
Read: Anytime
Write: Anytime
EDGnB and EDGnA — Input Capture Edge Control Bits
170
To operate the 16-bit pulse accumulators A and B (PACA and PACB) independently of input capture
or output compare 7 and 0, respectively, the user must set the corresponding bits IOSn = 1, OMn = 0,
and OLn = 0. OC7M7 or OC7M0 in the OC7M register must also be cleared.
These eight pairs of control bits configure the input capture edge detector circuits. See
Address: $008A
Address: $008B
Reset:
Reset:
Read:
Read:
Write:
Write:
EDG7B
EDG3B
OMn
Bit 7
Bit 7
EDGnB
0
0
0
0
1
1
Table 13-2. Edge Detector Circuit Configuration
Figure 13-14. Timer Control Register 3 (TCTL3)
Figure 13-15. Timer Control Register 4 (TCTL4)
0
0
1
1
Table 13-1. Compare Result Output Action
OLn
EDG7A
EDG3A
0
1
0
1
6
0
6
0
M68HC12B Family Data Sheet, Rev. 9.1
EDGnA
Timer disconnected from output pin logic
Toggle OCn output line
Clear OCn output line to 0
Set OCn output line to 1
0
1
0
1
EDG6B
EDG2B
5
0
5
0
Capture disabled
Capture on rising edges only
Capture on falling edges only
Capture on any edge (rising or falling)
EDG6A
EDG2A
4
0
4
0
Action
Configuration
EDG5B
EDG1B
3
0
3
0
EDG5A
EDG1A
2
0
2
0
EDG4B
EDG0B
1
0
1
0
Freescale Semiconductor
EDG4A
EDG0A
Bit 0
Bit 0
0
0
Table
13-2.