IBM uPD78P083(A) Manual Do Utilizador
142
CHAPTER 11 SERIAL INTERFACE CHANNEL 2
Table 11-2. Serial Interface Channel 2 Operating Mode Settings
(1) Operation Stop Mode
(2) 3-wire Serial I/O Mode
(3) Asynchronous Serial Interface Mode
Notes 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
/ASCK Pin
Functions
P71/SO2
/TxD Pin
Functions
/TxD Pin
Functions
P70/SI2
/RxD Pin
Functions
/RxD Pin
Functions
Shift
Clock
Clock
Start
Bit
Bit
TXE RXE SCK CSIE2 CSIM22 CSCK
PM70 P70 PM71 P71 PM72 P72
ASIM
CSIM2
0
0
x
0
x
x
x
Note1
x
Note1
x
Note1
x
Note1
x
Note1
x
Note1
—
—
P70
P71
P72
Other than above
Setting prohibited
P72/SCK2
/ASCK Pin
Functions
/ASCK Pin
Functions
P71/SO2
/TxD Pin
Functions
/TxD Pin
Functions
P70/SI2
/RxD Pin
Functions
/RxD Pin
Functions
Shift
Clock
Clock
Start
Bit
Bit
TXE RXE SCK CSIE2 CSIM22 CSCK
PM70 P70 PM71 P71 PM72 P72
ASIM
CSIM2
0
0
0
1
1
0
1
0
1
0
1
1
Note2
x
Note2
0
1
1
0
1
0
x
1
x
1
MSB
LSB
External
clock
clock
Internal
clock
clock
External
clock
clock
Internal
clock
clock
SI2
SO2
(CMOS
output)
(CMOS
output)
SCK2 input
SCK2 output
SCK2 input
SCK2 output
Other than above
Setting prohibited
Note2
P72/SCK2
/ASCK Pin
Functions
/ASCK Pin
Functions
P71/SO2
/TxD Pin
Functions
/TxD Pin
Functions
P70/SI2
/RxD Pin
Functions
/RxD Pin
Functions
Shift
Clock
Clock
Start
Bit
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
x
Note1
x
Note1
0
1
1
1
x
x
LSB
External
clock
clock
Internal
clock
clock
External
clock
clock
Internal
clock
clock
External
clock
clock
Internal
clock
clock
P70
TxD
(CMOS
output)
(CMOS
output)
ASCK input
P72
ASCK input
P72
ASCK input
P72
P71
Note1
x
Note1
x
1
0
1
0
1
1
1
x
x
x
Note1
Note1
x
RxD
Note1
x
Note1
x
0
1
1
x
TxD
(CMOS
output)
(CMOS
output)
Note1
x
Note1
x
Other than above
Setting prohibited