MC68HC11PH8 Datasheet, PDF (158/264 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

ST4XCK/2⁸ clock
(from main timer)
&
PA7/
OC1/
PAI
Input buffer
and edge detector
Output buffer
8
From
OC1
From
DDRA7
TOF
RTIF
PAOVF
PAIF
0
0
0
0
TOI
RTII
PAOVI
PAII
0
0
PR1
PR0
Overßow
2:1 Clock
MUX
PACNT
Enable
PACTL
Internal data bus
&1
Interrupt
requests
&2
Figure 8-4 Pulse accumulator block diagram
Pulse accumulator control bits are located within the PACTL, TMSK2 and TFLG2 registers, as
described in the following paragraphs.
MOTOROLA
8-24
TIMING SYSTEM
TPG
MC68HC11PH8