參數(shù)資料
型號: μPD789800
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): 11/48頁
文件大?。?/td> 266K
代理商: ΜPD789800
11
μ
PD789800
3.2
Non-Port Pins
Pin name
I/O
Function
When reset
Also used as
INTP0
Input
External interrupt request input for which effective edges
(rising and/or falling edges) can be specified
Input
P26/TI01/TO01
KR00
-
KR07
Input
Input for detecting key return signals
Input
P40-P47
REGC
Input
Internally generated power supply for driving USB
driver/receiver. Connect this pin to V
SS
through a 220-
resistor and a 0.1-
μ
F capacitor.
-
-
RESET
Input
System reset input
Input
-
SCK10
I/O
Serial clock input/output for serial interface
Input
P20
SI10
Input
Serial data input for serial interface
Input
P22
SO10
Output
Serial data output for serial interface
Input
P21
TI01
Input
External count clock input to 8-bit timer/event counter 01
Input
P26/INTP0/TO01
TO01
Output
Timer output from 8-bit timer/event counter 01
Input
P26/INTP0/TI01
USBDM
I/O
Serial data input/output (negative side) for USB function. The
pull-up resistor (1.5 k
) for the USBDM pin must be
connected to the REGC pin.
Input
-
USBDP
I/O
Serial data input/output (positive side) for USB function
Input
-
X1
Input
Input
X2
-
Connected to crystal for system clock oscillator
-
-
V
DD0
-
Positive supply voltage for ports
-
-
V
DD1
-
Positive supply voltage for circuits other than ports
-
-
V
SS0
-
Ground potential for ports
-
-
V
SS1
-
Ground potential for circuits other than ports
-
-
IC
-
Internally connected. Connect this pin directly to V
SS0
.
-
-
NC
-
Not internally connected. Leave this pin open.
-
-
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