MC68HC11PH8 Datasheet, PDF (140/264 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

Crystal EXTALi ≡ ST4XCK
oscillator
÷4
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
Baud
÷2
÷ 1, 2, 3, 4,É, 8191
SBR[12:0]
SCI receiver clock
÷ 16
SCI transmitter clock
(baud rate)
8-bit modulus timer A
÷ 2 ^CLK64
LCDCK
÷ 2¹⁸
0 LCD
clock
LCD
1 _select
÷4
8
÷ 2¹³
÷4
Prescaler
÷ 1, 4, 8, 16
PR[1:0]
÷ 2⁶
Prescaler
÷ 1, 2, 4, 8
RTR[1:0]
TCNT
TOF
IC/OC
Pulse accumulator
Real time interrupt
Clear COP timer
System reset
Prescaler
÷ 1, 4, 16, 64
CR[1:0]
Set
Q
FF1
Reset Q
+
Set
Q
FF2
Reset Q
Force COP reset
Figure 8-2 Timer clock divider chains (PLL disabled — VDDSYN low)
MOTOROLA
8-6
TIMING SYSTEM
TPG
MC68HC11PH8