MC68HC11PH8 Datasheet, PDF (139/264 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

PLL
1 Bus
clock
4XCLK
÷4
0 _select
BCS
Prescaler
÷ 2, 4, 8,16, 32, 64, 128
SPR[2:0]
E clock
Internal bus clock
PH2 (for CPU, PWM,
A/D and memory)
SPI
Crystal _EXTALi
oscillator
Prescaler
÷ 1, 4, 8
CSA[2:0]
1 Module
clock
0 select
Baud
÷2
÷ 1, 2, 3, 4,É, 8191
SBR[12:0]
÷ 16
ST4XCK
MCS
÷4
Prescaler
÷ 1, 4, 8, 16
PR[1:0]
TCNT
SCI receiver clock
SCI transmitter clock
(baud rate)
TOF
IC/OC
÷ 2⁶
Pulse accumulator
8-bit modulus timer A
÷ 2 ^CLK64
÷4
Prescaler
÷ 1, 2, 4, 64
RTR[1:0]
LCDCK
0 LCD
clock
÷2
1 _select
Real time interrupt
8
LCD
Prescaler
÷ 1, 4, 16, 64
CR[1:0]
Clear COP timer
System reset
Set
Q
Set
Q
FF1
FF2
Reset Q
+
Reset Q
Force COP reset
Figure 8-1 Timer clock divider chains (PLL enabled — VDDSYN high)
MC68HC11PH8
TIMING SYSTEM
TPG
MOTOROLA
8-5