參數(shù)資料
型號(hào): UPD754202A
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 4位單晶片微控制器
文件頁(yè)數(shù): 9/66頁(yè)
文件大?。?/td> 302K
代理商: UPD754202A
9
μ
PD754202, 754202(A)
3.2 Non-port Pins
Pin Name
Input/Output
Alternate
Function
Function
After Reset
I/O Circuit
Type
Note
PTO0
Output
P30
Timer counter output
Input
E-B
PTO1
P31
PTO2
P32
INT0
Input
P61
Edge detection vectored
Noise eliminator/
interrupt input (detected asynchronous
edge is selectable) selectable
Noise eliminator
selectable
Input
F -A
KR4 to KR7
Input
P70 to P73
Falling edge detection testable input
Input
B -A
KRREN
Input
Key return reset enable.
When KRREN = high level in STOP mode, reset
signal is generated at falling edge of KRn.
Input
B
X1
Input
System clock oscillation crystal/ceramic
connection pin.
If using an external clock, input to X1 and reverse
input to X2.
X2
RESET
Input
System reset input (low-level active).
Pull-up resistor can be incorporated on-chip
(mask option).
B -A
IC
Internally connected. Connect directly to V
DD
.
V
DD
Positive power supply
V
SS
Ground potential
Note
Circled characters indicate Schmitt trigger input.
相關(guān)PDF資料
PDF描述
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