MC68HC12 Datasheet, PDF (246/478 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
To TCNT Counter
CLK1
CLK0
4:1 MUX
Prescaled MCLK
(TMSK2 bits PR2-PR0)
Interrupt
Clock select
(PAMOD)
Edge detector
PT7
8-bit PAC3 (PACN3)
8-bit PAC2 (PACN2)
PACA
MUX
Divide by 64
M clock
Interrupt
8-bit PAC1 (PACN1)
8-bit PAC0 (PACN0)
PACB
Delay counter
Edge detector
PT0
Figure 15-4. 16-Bit Pulse Accumulators Block Diagram
Technical Data
246
Enhanced Capture Timer
MC68HC912DT128A — Rev 4.0
MOTOROLA