Freescale Semiconductor, Inc.
Electrical Specifications
3.3-Volt Serial Peripheral Interface (SPI) Timing
SS
INPUT
SS pin of master held high.
12
13
12
13
7
1
5
4
SCK (CPOL = 0)
OUTPUT
NOTE
4
5
12
SCK (CPOL = 1)
OUTPUT
NOTE
6
MISO
MSB IN
BITS 6–1
BITS 6–1
LSB IN
INPUT
10
11
MASTER MSB OUT
10
11
MASTER LSB OUT
12
MOSI
OUTPUT
13
Note: This first clock edge is generated internally, but is not seen at the SCK pin.
a) SPI Master Timing (CPHA = 0)
SS
INPUT
SS pin of master held high.
1
13
12
12
SCK (CPOL = 0)
OUTPUT
5
4
NOTE
NOTE
4
5
13
SCK (CPOL = 1)
OUTPUT
6
7
MISO
MSB IN
BITS 6–1
BITS 6–1
LSB IN
INPUT
10
11
MASTER MSB OUT
10
11
MASTER LSB OUT
12
MOSI
OUTPUT
13
Note: This last clock edge is generated internally, but is not seen at the SCK pin.
b) SPI Master Timing (CPHA = 1)
Figure 13-8. SPI Master Timing
MC68HC705C8A — Rev. 3
MOTOROLA
Technical Data
Electrical Specifications
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