MC68HC12 Datasheet, PDF (292/478 Pages) Motorola, Inc – The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit

Multiple Serial Interface
Transfer
Begin
End
SCK (CPOL=0)
SCK (CPOL=1)
SAMPLE I
(MOSI/MISO)
CHANGE O
(MOSI pin)
CHANGE O
(MISO pin)
SEL SS (O)
(Master only)
SEL SS (I)
t_L
MSB first (LSBF=0): MSB
LSB first (LSBF=1): LSB
Bit 6
Bit 1
Bit 5
Bit 2
Bit 4
Bit 3
Bit 3
Bit 4
Bit 2
Bit 5
Bit 1
Bit 6
LSB
MSB
t_T t_I t_L
Minimum 1/2 SCK
for t_T, t_l, t_L
HC12 SPI CLOCK FORM 0
Figure 16-4. SPI Clock Format 0 (CPHA = 0)
Technical Data
292
Multiple Serial Interface
MC68HC912DT128A — Rev 4.0
MOTOROLA