UPD7554AA 데이터 시트보기 (PDF) - NEC => Renesas Technology
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UPD7554AA Datasheet PDF : 64 Pages
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µPD7554A, 7554A(A)
1. PIN FUNCTIONS
1.1 PORT FUNCTIONS
Pin Name
P00
P01
P02
P03
P80 to P82
P83 Note
Dual-Function
Input/Output
Pin
Function
Input
Input/output
Input
INT0
SCK
SO
SI
4-bit input port (Port 0)
P00 serves also as a count clock (event pulse)
input.
Output
Output
––
4-bit output port (Port 8)
High current (15 mA), middle-high voltage (9 V)
CL2
output
Input/Output
After RESET
Circuit
S
X
Input
W
S
High
O
impedance
4-bit I/O port (Port 10)
P100 to P103 Input/output
––
Middle-high current (10 mA), middle-high voltage
High
(9 V) input/output
impedance
or
P
4-bit I/O port (Port 11)
high-level
P110 to P113 Input/output
––
Middle-high current (10 mA), middle-high voltage
output
(9 V) input/output
Note Mask options are available to specify port functions only when the external clock (CL1) is used.
1.2 OTHER THAN PORTS
Pin Name
INT0
SCK
SO
SI
CL1
CL2
RESET
VDD
VSS
Dual-Function
Input/Output
Pin
Function
Input
P00
Edge detection testable input pin (Rising edge)
Input/output
P01
Serial clock Input/output pin
Output
P02
Serial data output pin
Input
P03
Serial data input pin
Connection pin for resistor R for RC oscillator
When an external clock is used, its input must be
P83
connected to CL1, and CL2 can be used as P83
using the mask option.
System reset input pin (high-level active)
A pull-down resistor can be incorporated using
the mask option.
Positive power supply pin
GND potential pin
Input/Output
After RESET
Circuit
S
Input
X
Input
W
Input
S
Q
R
6
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