參數(shù)資料
型號: μPD789216Y
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): 69/144頁
文件大?。?/td> 632K
代理商: ΜPD789216Y
Preliminary Product Information
69
μ
PD789216Y, 789217Y
Table 6-13. Serial Interface 20 Operation Mode Settings
(i)
Operation stopped mode
ASIM20
CSIM20
TXE20 RXE20 CSIE20 DIR20
CSCK20
PM22 P22 PM21 P21 PM20 P20
First bit
Shift
clock
P22/SI20/
RxD20 pin
function
P21/SO20/Tx
D20 pin
function
P20/SCK20/
ASCK20 pin
function
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
PM22 P22 PM21 P21 PM20 P20 First bit
Shift
clock
P22/SI20/
RxD20 pin
function
P21/SO20/Tx
D20 pin
function
P20/SCK20/
ASCK20 pin
function
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
SO20
(CMOS
output)
SCK20
output
Other settings
Not to be set
(iii) Asynchronous serial interface mode
ASIM20
CSIM20
TXE20 RXE20 CSIE20 DIR20
CSCK20
PM22 P22 PM21 P21 PM20 P20
First bitclock
P22/SI20/
RxD20 pin
function
P21/SO20/Tx
D20 pin
function
P20/SCK20/
ASCK20 pin
function
1
0
0
0
0
×
Note 1
×
Note 1
0
1
1
×
LSB
External
clock
P22
ASCK20
input
×
Note 1
×
Note 1
Internal
clock
TxD20
(CMOS
output)
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
TxD20
(CMOS
output)
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.
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