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參數(shù)資料
| 型號： | μPD78P9014 |
| 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)： | 10/48頁 |
| 文件大?。?/td> | 191K |
| 代理商： | ΜPD78P9014 |
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μ
PD78P9014
10
(2)
Pins not in the ports
Pin Name
I/O Function
On Reset
Alternate Function Pin
INTP0
Note
Input
External interrupt input whose valid edge can be specified (rising
edge, falling edge, or both the rising and falling edges)
Input
P30/TI0/TO0
INTP1
Note
P31/TI1/TO1
INTP2
Note
P32
SI0
Note
Input
Serial data input in the serial interface
Input
P22/RxD
SO0
Output
Serial data output in the serial interface
Input
P21/TxD
SCK0
Note
I/O
Serial clock I/O for the serial interface
Input
P20/ASCK
RxD
Note
Input
Serial data input for the asynchronous serial interface
Input
P22/SI0
TxD
Output
Serial data output for the asynchronous serial interface
Input
P21/SO0
ASCK
Note
Input
Serial clock input for the asynchronous serial interface
Input
P20/SCK0
TI0
Note
Input
External count clock input to the 8-bit timer (TM0)
Input
P30/INTP0/TO0
TI1
Note
External count clock input to the 8-bit timer (TM1)
P31/INTP1/TO1
TO0
Output
8-bit timer output
Input
P30/INTP0/TI0
TO1
P31/INTP1/TI1
RESET
Input
System reset input
Input
–
X1
Input
Crystal connection for the main system clock oscillation
–
–
X2
–
–
–
V
DD
–
Positive power supply
–
–
V
PP
–
High voltage applied when writing or verifying programs.
In the normal operating mode, this is directly connected to V
SS
.
–
–
V
SS
–
Ground potential
–
–
Note
These pins are input through Schmitt triggers. (See
Type 5-D in Figure 4-1, “Pin I/O Circuit Types
.”)
4.2 Pins in the PROM Programming Mode
Pin Name
I/O
Function
RESET
Input
Connect to V
SS
.
V
PP
Input
High voltage applied when setting the PROM programming mode and when writing a program or
verifying.
If +5.5 V is applied to the V
DD
pin and +12.5 V is applied to the V
PP
pin, the PROM programming
mode is entered.
MD0-MD3
I/O
Select the operating mode when in the PROM programming mode.
D0-D7
I/O
Data bus
X1
Input
Clock input for address updating in the PROM programming mode
V
DD
–
PROM programming mode setting and the positive power supply
V
SS
–
Ground potential
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