
3.0-V SPI Characteristics
MC68HC908GP32 Data Sheet, Rev. 10
Freescale Semiconductor
249
Figure 19-17. SPI Master Timing
NOTE
Note: This first clock edge is generated internally, but is not seen at the SPSCK pin.
SS PIN OF MASTER HELD HIGH
MSB IN
SS
INPUT
SPSCK OUTPUT
MISO
INPUT
MOSI
OUTPUT
NOTE
4
5
1
4
BITS 6–1
LSB IN
MASTER MSB OUT
BITS 6–1
MASTER LSB OUT
11
10
11
7
6
NOTE
Note: This last clock edge is generated internally, but is not seen at the SPSCK pin.
SS PIN OF MASTER HELD HIGH
MSB IN
SS
INPUT
SPSCK OUTPUT
MISO
INPUT
MOSI
OUTPUT
NOTE
4
5
1
4
BITS 6–1
LSB IN
MASTER MSB OUT
BITS 6–1
MASTER LSB OUT
10
11
10
7
6
a) SPI Master Timing (CPHA = 0)
b) SPI Master Timing (CPHA = 1)
CPOL = 0
CPOL = 1
CPOL = 0
CPOL = 1