參數(shù)資料
型號： μPD78F9177Y
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述： 8位單片機微控制器（8位單片微控制器）
文件頁數(shù)： 71/150頁
文件大小： 653K
代理商： ΜPD78F9177Y
Preliminary Product Information
69
μ
PD78F9177Y
Table 6-13. Serial Interface 20 Operation Mode Settings
(i)
Operation stopped mode
ASIM20
CSIM20
TXE20 RXE20 CSIE20 DIR20
CSCK20
0
0
0
×
×
×
Note 1
×
Note 1
×
Note 1
×
Note 1
×
Note 1
×
Note 1
-
-
P22
P21
P20
Other settings
Not to be set
(ii) Three-wire serial I/O mode
ASIM20
CSIM20
TXE20 RXE20 CSIE20 DIR20
CSCK20
0
0
1
0
0
1
Note 2
×
Note 2
0
1
1
×
MSB
External
clock
SI20
Note2
SCK20
input
1
0
1
Internal
clock
SCK20
output
1
1
0
1
×
LSB
External
clock
SCK20
input
1
0
1
Internal
clock
SCK20
output
Other settings
Not to be set
(iii) Asynchronous serial interface mode
ASIM20
CSIM20
TXE20 RXE20 CSIE20 DIR20
CSCK20
1
0
0
0
0
×
Note 1
×
Note 1
0
1
1
×
LSB
External
clock
P22
ASCK20
input
×
Note 1
×
Note 1
Internal
clock
P20
0
1
0
0
0
1
×
×
Note 1
×
Note 1
1
×
External
clock
RxD20
P21
ASCK20
input
×
Note 1
×
Note 1
Internal
clock
P20
1
1
0
0
0
1
×
0
1
1
×
External
clock
ASCK20
input
×
Note 1
×
Note 1
Internal
clock
P20
Other settings
Not to be set
Notes 1.
These pins can be used for port functions.
2.
When only transmission is used, these pins can be used as P22 (CMOS input/output).
Remark
×
: Don’t care.
First
bit
P20
PM20
P21
PM21
P22
PM22
P22/SI20/
RxD20 pin
function
Shift
clock
P21/SO20/
TxD20 pin
function
P20/SCK20/
ASCK20 pin
function
Shift
clock
Shift
clock
First
bit
First
bit
P22/SI20/
RxD20 pin
function
P21/SO20/
TxD20 pin
function
SO20
(CMOS
output)
P20/SCK20/
ASCK20 pin
function
P22/SI20/
RxD20 pin
function
P21/SO20/
TxD20 pin
function
TxD20
(CMOS
output)
P20/SCK20/
ASCK20 pin
function
TxD20
(CMOS
output)
P20
PM20
P21
PM21
P22
PM22
P20
PM20
P21
PM21
P22
PM22
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