MC68HC711xxxx Motorola, MC68HC711xxxx Datasheet - Page 142

• Manufacturer Part Number: MC68HC711xxxx
• Description: Microcontrollers
• Manufacturer: Motorola

Timing System
Data Sheet
142
* SCP2 present on MC68HC(7)11E20 only
CLOCK GENERATOR
OSCILLATOR AND
(DIVIDE BY FOUR)
(÷ 2, 4, 16, 32)
PRESCALER
(÷ 1, 4, 8, 16)
PRESCALER
PRESCALER
(÷ 1, 3, 4, 13)
SPR[1:0]
SCP[1:0]
PR[1:0]
TCNT
IC/OC
E ÷ 2
E ÷ 2
13
6
Figure 9-1. Timer Clock Divider Chains
SCP2
÷39
TOF
*
CLEAR COP
÷ 4
TIMER
E÷2
(÷ 1, 2, 4,....128)
(÷1, 4, 16, 64)
Timing System
PRESCALER
PRESCALER
PRESCALER
15
(÷÷ 1, 2, 4, 8)
SCR[2:0]
RTR[1:0]
CR[1:0]
S
R
FF1
Q
Q
SYSTEM
RESET
÷16
AS
E CLOCK
INTERNAL BUS CLOCK (PH2)
SPI
SCI RECEIVER CLOCK
SCI TRANSMIT CLOCK
PULSE ACCUMULATOR
REAL-TIME INTERRUPT
S
R
FF2
Q
Q
M68HC11E Family — Rev. 5
FORCE
RESET
COP
E SERIES TIM DIV CHAIN
MOTOROLA