Serial Interface Channel 2 Operating Mode Settings - NEC PD78052 User Manual

Table 19-2. Serial Interface Channel 2 Operating Mode Settings
(1) Operation Stop Mode
ASIM CSIM2
TXE RXE SCK CSIE2 CSIM22 CSCK
0 0 0
Other than above
(2) 3-wire Serial I/O Mode
ASIM CSIM2
TXE RXE SCK CSIE2 CSIM22 CSCK
0 0 0 1 0
1 1
Other than above
(3) Asynchronous Serial Interface Mode
ASIM CSIM2
TXE RXE SCK CSIE2 CSIM22 CSCK
1 0 0 0 0
1
0 1 0 0 0
1
1 1 0 0 0
1
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
446
CHAPTER 19 SERIAL INTERFACE CHANNEL 2
PM70 P70 PM71 P71 PM72 P72
Note1
Note1 Note1
PM70 P70 PM71 P71 PM72 P72
Note2 Note2
1 1
0
1
PM70 P70 PM71 P71 PM72 P72
Note1 Note1
0
0
Note1
0 1
0
1 0
Other than above
Start Shift
Bit Clock
Note1 Note1
Note1
— —
Start Shift
Bit Clock
1 0 1 MSB Internal
clock
LSB
Start Shift
Bit Clock
1 1 LSB External
clock
Note1
Note1
Internal
clock
Note1
1
External
clock
Note1 Note1
Internal
clock
External
1 1
clock
Note1 Note1
Internal
clock
P72/SCK2
P70/SI2 P71/SO2
/ASCK Pin
/RxD Pin /TxD Pin
Functions Functions Functions
P70 P71 P72
Setting prohibited
P72/SCK2
P70/SI2 P71/SO2
/ASCK Pin
/RxD Pin /TxD Pin
Functions
Functions Functions
Note2
SI2 SO2 SCK2 output
(CMOS
output)
Note2
SI2 SO2
(CMOS
output)
Setting prohibited
P72/SCK2
P70/SI2 P71/SO2
/ASCK Pin
/RxD Pin /TxD Pin
Functions
Functions Functions
TxD ASCK input
P70
(CMOS
output)
P72
RxD P71 ASCK input
P72
TxD
ASCK input
(CMOS
output)
P72
Setting prohibited