229
CHAPTER 8 APPLICATIONS OF SERIAL INTERFACE
Table 8-4.
Setting of Operation Modes of Serial Interface Channel 2
(
μ
PD78054, 78054Y, 78064, 78064Y, 78078, 78078Y, 78083, 78098, 78058F, 78058FY,
78064B, 78075B, 78075BY, 78098B subseries,
μ
PD78070A, 78070AY)
(1) Operation stop mode
ASIM
CSIM2
PM70
P70 PM71 P71
PM72
P72 First
Shift
Function of Function of Function of
TXE RXE SCK
CSIE2
CSIM22
CSCK
bit
clock
P70/SI2/RxD P71/SO2/TxD
P72/SCK2/ASCK
pin
pin
pin
0
0
×
0
×
×
×
Note
1
×
Note 1
×
Note 1
×
Note 1
×
Note 1
×
Note
1
–
–
P70
P71
P72
Others
Setting prohibited
(2) 3-wire serial I/O mode
ASIM
CSIM2
PM70
P70 PM71 P71
PM72
P72 First
Shift
Function of Function of Function of
TXE RXE SCK
CSIE2
CSIM22
CSCK
bit
clock
P70/SI2/RxD P71/SO2/TxD
P72/SCK2/ASCK
pin
pin
pin
0
0
0
1
0
0
1
Note 2
×
Note 2
0
1
1
×
MSB
External
SI2
Note 2
SO2
SCK2 input
clock
(CMOS output)
1
0
1
Internal
SCK2 output
clock
External
SI2
Note 2
1
1
0
1
×
LSB
SO2
SCK2 input
clock
(CMOS output)
1
0
1
Internal
SCK2 output
clock
Others
Setting prohibited
(3) Asynchronous serial interface mode
ASIM
CSIM2
PM70
P70 PM71 P71
PM72
P72 First
Shift
Function of Function of Function of
TXE RXE SCK
CSIE2
CSIM22
CSCK
bit
clock
P70/SI2/RxD P71/SO2/TxD
P72/SCK2/ASCK
pin
pin
pin
1
0
0
0
0
0
×
Note 1
×
Note 1
0
1
1
×
LSB
External
P70
TxD
ASCK input
clock
(CMOS output)
1
×
Note 1
×
Note 1
Internal
P72
clock
0
1
0
0
0
0
1
×
×
Note 1
×
Note 1
1
×
External
RxD
P71
ASCK input
clock
1
×
Note 1
×
Note 1
Internal
P72
clock
1
1
0
0
0
0
1
×
0
1
1
×
External
TxD
ASCK input
clock
(CMOS output)
1
×
Note 1
×
Note 1
Internal
P72
clock
Others
Setting prohibited
Notes 1.
These pins can be used as port pins.
2.
This pin can be used as P70 (CMOS I/O) when only transmission is executed.
Remark
×
: don’t care
PM
××
: port mode register
P
××
: output latch of port