
20. Electrical characteristics
A96G166/A96A166/A96S166 User’s manual
210
Figure 107. SPI slave mode timing (UCPHA = 0, MSB first)
NOTE:
When in Synchronous mode, the START bit becomes MSB and the 1
st
or 2
nd
STOP bit
becomes LSB.
Figure 108. SPI/Synchronous slave mode timing (UCPHA = 1, MSB first)
XCK0
(UCPOL=1)
(OUTPUT)
MOSI
(OUTPUT)
MISO
(INPUT)
t
XCK
0.8VDD
0.2VDD
t
HOM
XCK0
(UCPOL=0)
(OUTPUT)
t
XCKH
t
XCKL
/SS0
(OUTPUT)
MSB
LSB
LSB
MSB
t
SIM
t
HIM
t
DIS
t
LEAD
t
SOM
BIT 6 … 1
BIT 6 … 1
t
LAG
XCKx
(UCPOL=1)
(INPUT)
MOSI/TX1
(INPUT)
MISO/RX1
(OUTPUT)
t
XCK
0.8VDD
0.2VDD
t
HIM
XCKx
(UCPOL=0)
(INPUT)
t
XCKH
t
XCKL
/SS0
(INPUT)
MSB
LSB
LSB
MSB
t
SOS
t
HOS
t
DIS
t
LEAD
t
SIM
BIT 6 … 1
BIT 6 … 1