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CHAPTER 19 SERIAL INTERFACE CHANNEL 2
Table 19-2. Serial Interface Channel 2 Operating Mode Settings(1) Operation Stop Mode(2) 3-wire Serial I/O Mode(3) Asynchronous Serial Interface ModeNotes 1. Can be used freely as port function.2. Can be used as P70 (CMOS input/output) when only transmitter is used.Remark ×: Don't care
PM×× : Port mode register
P×× : Port output latch

P72/SCK2

/ASCK Pin

Functions

P71/SO2

/TxD Pin

Functions

P70/SI2

/RxD Pin

Functions

Shift

Clock

Start

Bit

TXE RXE SCK CSIE2 CSIM22 CSCK

PM70 P70 PM71 P71 PM72 P72

ASIM CSIM2

0 0 ×0×××

Note1 ×Note1 ×Note1 ×
Note1

×Note1 ×

Note1

— — P70 P71 P72

Other than above Setting prohibited

P72/SCK2
/ASCK Pin
Functions
P71/SO2
/TxD Pin
Functions
P70/SI2
/RxD Pin
Functions
Shift
Clock
Start
Bit
TXE RXE SCK CSIE2 CSIM22 CSCK
PM70 P70 PM71 P71 PM72 P72
ASIM CSIM2
000 1
1
0
1
1
1
1
Note2
×
Note2
0101 MSB
LSB
Internal
clock
SI2
SI2
SO2
(CMOS
output)
SCK2 output
Other than above Setting prohibited
Note2
Note2
SO2
(CMOS
output)
P72/SCK2
/ASCK Pin
Functions
P71/SO2
/TxD Pin
Functions
P70/SI2
/RxD Pin
Functions
Shift
Clock
Start
Bit
TXE RXE SCK CSIE2 CSIM22 CSCK
PM70 P70 PM71 P71 PM72 P72
ASIM CSIM2
1
0
1
0
1
1
0 0
0
0
0
0
0
0
0
0
×
Note1
×
Note1
011
1
×
×
LSB
External
clock
Internal
clock
External
clock
Internal
clock
External
clock
Internal
clock
P70 TxD
(CMOS
output)
ASCK input
P72
ASCK input
P72
ASCK input
P72
P71
Note1
×
Note
1
×
1
0
1
0
1
1
1
×
×
×
Note1
Note
1
×RxD
Note
1
×
Note
1
×
011×TxD
(CMOS
output)
Note
1
×
Note
1
×
Other than above Setting prohibited