Datasheet

Electrical Characteristics
MC68HC812A4 Data Sheet, Rev. 7
236 Freescale Semiconductor
A) SPI Slave Timing (CPHA = 0)
B) SPI Slave Timing (CPHA = 1)
Figure 18-9. SPI Timing Diagram (Sheet 2 of 2)
SCK
INPUT
SCK
INPUT
MOSI
INPUT
MISO
OUTPUT
SS
INPUT
1
10
6 7
MSB IN
BIT 6 . . . 1
LSB IN
MSB OUT
SLAVE LSB OUT
BIT 6 . . . 1
11
4
4
2
8
CPOL = 0
CPOL = 1
5
3
13
Note: Not defined but normally MSB of character just received
SLAVE
13
12
11
SEE
12
NOTE
9
SCK
INPUT
SCK
INPUT
MOSI
INPUT
MISO
OUTPUT
1
6 7
MSB IN
BIT 6 . . . 1
LSB IN
MSB OUT
SLAVE LSB OUT
BIT 6 . . . 1
4
4
10
12 13
11
SEE
CPOL = 0
CPOL = 1
SS
INPUT
5
2
13 12
3
Note: Not defined but normally LSB of character just received
SLAVE
NOTE
8
9