mpc82l54 Megawin Technology, mpc82l54 Datasheet - Page 53

• Manufacturer Part Number: mpc82l54
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

MEGAWIN
Driven from the target slave
Control GPIO pin by software
Target slave SS pin
SS pin( if SSIG=0)
MISO (Input)
SPICLK(CPOL=0)
SPICLK(CPOL=1)
MOSI (Output)
Clock Cycle
SPEN=1 and MSTR=1, MOSI turns to output data
MISO turns to input data
DORD=0
DORD=1
SPICLK is strongly output-driving.
SPI master transfer format with CPHA=1
DORD=1
DORD=0
MSB
LSB
MPC82x54A Data Sheet
MSB
1
LSB
MOV SPDAT,#data in software
2
6
1
6
1
3
5
2
5
2
4
4
3
4
3
5
3
4
3
4
6
2
5
2
5
7
1
6
1
6
8
MSB
MSB
LSB
LSB
SPEN=0 or MSTR=0, MOSI switched not to output
data of SPI communication, also SPICLK is
released from SPI control
53