MC68HC11E0CFNE3 Datasheet, PDF (128/242 Pages) Freescale Semiconductor, Inc – M68HC11E Family

Timing Systems
OSCILLATOR AND
CLOCK GENERATOR
(DIVIDE BY FOUR)
PRESCALER
(÷ 2, 4, 16, 32)
SPR[1:0]
AS
E CLOCK
INTERNAL BUS CLOCK (PH2)
SPI
PRESCALER
(÷ 1, 3, 4, 13)
SCP[1:0]
÷39
SCP2^*
PRESCALER
(÷ 1, 2, 4,....128)
SCR[2:0]
E ÷ 2⁶
E ÷ 2¹³
PRESCALER
(÷÷ 1, 2, 4, 8)
RTR[1:0]
÷4
E÷2¹⁵
SCI RECEIVER CLOCK
÷16
SCI TRANSMIT CLOCK
PULSE ACCUMULATOR
REAL-TIME INTERRUPT
PRESCALER
(÷ 1, 4, 8, 16)
PR[1:0]
TOF
TCNT
PRESCALER
(÷1, 4, 16, 64)
CR[1:0]
FF1
SQ
RQ
FF2
SQ
RQ
IC/OC
* SCP2 present on MC68HC(7)11E20 only
CLEAR COP
TIMER
SYSTEM
RESET
Figure 9-1. Timer Clock Divider Chains
FORCE
COP
RESET
E SERIES TIM DIV CHAIN
M68HC11E Family Data Sheet, Rev. 5.1
128
Freescale Semiconductor