mc68hc711k4 Freescale Semiconductor, Inc, mc68hc711k4 Datasheet - Page 175

• Manufacturer Part Number: mc68hc711k4
• Description: Hcmos Microcontroller Unit
• Manufacturer: Freescale Semiconductor, Inc

M68HC11K Family
MOTOROLA
E Clock Freq.
EXTAL Freq.
Control Bits
SPR[2:0]
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
62.5 kHz
31.3 kHz
15.6 kHz
8.0 MHz
2.0 MHz
1.0 MHz
500 kHz
125 kHz
250 kHz
125 kHz
CPOL — Clock Polarity Bit
CPHA — Clock Phase Bit
SPR[1:0] — SPI Clock Rate Select Bits
When the clock polarity bit is cleared and data is not being
transferred, the SCK pin of the master device has a steady state low
value. When CPOL is set, SCK idles high.
The clock phase bit, in conjunction with the CPOL bit, controls the
clock-data relationship between master and slave. The CPHA bit
selects one of two different clocking protocols.
On a master device, these two bits in conjunction with SPR2 in the
OPT2 register select the baud rate to be used as SCK. See
These bits have no effect in slave mode.
Freescale Semiconductor, Inc.
For More Information On This Product,
187.5 kHz
187.5 kHz
12.0 MHz
93.8 kHz
46.9 kHz
23.4 kHz
3.0 MHz
1.5 MHz
750 kHz
375 kHz
Table 8-1. SPI+ Baud Rates
Serial Peripheral Interface (SPI)
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EXTAL Frequencies
SPI Baud Rate
16.0 MHz
62.5 kHz
31.3 kHz
4.0 MHz
2.0 MHz
1.0 MHz
250 kHz
125 kHz
500 kHz
250 kHz
312.5 kHz
156.3 kHz
312.5 kHz
20.0 MHz
78.1 kHz
39.1 kHz
5.0 MHz
2.5 MHz
625 kHz
1.3 kHz
375.0 kHz
187.5 kHz
750.0 kHz
375.0 kHz
24.0 MHz
93.8 kHz
46.9 kHz
Serial Peripheral Interface (SPI)
6.0 MHz
3.0 MHz
1.5 MHz
Other EXTAL
EXTAL
Divide by
Technical Data
E Clock
SPI Registers
Table
128
16
32
16
64
2
4
8
4
8-1.
175