MC68HC912BL16 Datasheet, PDF (81/128 Pages) Freescale Semiconductor, Inc – 16-Bit Microcontroller

Freescale Semiconductor, Inc.
TCTL4 — Timer Control Register 4
Bit 7
6
5
EDG3B EDG3A EDG2B
RESET:
0
0
0
4
EDG2A
0
3
EDG1B
0
2
EDG1A
0
1
EDG0B
0
Bit 0
EDG0A
0
$008B
Read or write anytime.
NOTE
Port T[6] is not bonded to any pin in MC68HC912BL16.
EDGnB, EDGnA — Input Capture Edge Control
These eight pairs of control bits configure the input capture edge detector circuits.
Table 26 Edge Detector Circuit Configuration
EDGnB
0
0
1
1
EDGnA
0
1
0
1
Configuration
Capture disabled
Capture on rising edges only
Capture on falling edges only
Capture on any edge (rising or falling)
TMSK1 — Timer Interrupt Mask 1
$008C
Bit 7
6
5
4
3
2
1
Bit 0
C7I
C6I
C5I
C4I
C3I
C2I
C1I
C0I
RESET:
0
0
0
0
0
0
0
0
The bits in TMSK1 correspond bit-for-bit with the bits in the TFLG1 status register. If cleared, the cor-
responding flag is disabled from causing a hardware interrupt. If set, the corresponding flag is enabled
to cause a hardware interrupt.
Read or write anytime.
NOTE
Port T[6] is not bonded to any pin in MC68HC912BL16.
C7I–C0I — Input Capture/Output Compare “x” Interrupt Enable.
TMSK2 — Timer Interrupt Mask 2
$008D
Bit 7
6
TOI
0
RESET:
0
0
Read or write anytime.
5
4
3
2
1
Bit 0
PUPT RDPT TCRE
PR2
PR1
PR0
0
0
0
0
0
0
TOI — Timer Overflow Interrupt Enable
0 = Interrupt inhibited
1 = Hardware interrupt requested when TOF flag set
PUPT — Timer Pull-Up Resistor Enable
This enable bit controls pull-up resistors on the timer port pins when the pins are configured as inputs.
1 = Enable pull-up resistor function
0 = Disable pull-up resistor function
RDPT — Timer Drive Reduction
This bit reduces the effective output driver size which can reduce power supply current and generated
noise depending upon pin loading.
MC68HC912BL16TS/D
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