upd4704 Renesas Electronics Corporation., upd4704 Datasheet - Page 2

• Manufacturer Part Number: upd4704
• Description: Extension 8-bit Up/down Counter Cmos Integrated Circuits
• Manufacturer: Renesas Electronics Corporation.

2
BLOCK DIAGRAM
PIN FUNCTIONS
Pin Name
Up
Down
D
Carry
Borrow
RESET
OE
STB
V
GND
DD
0 to 7
Reset
A
B
Input/Output
(Schmitt)
(3-state)
Output
Output
Output
Input
Input
Input
Input
Edge Detection
Discrimination
Up-count & down-count signal input pins
Count is performed on rise of signal.
Count data output pins. Activated when OE is “L”, high impedance outputs when OE
is “H”.
8-bit counter carry signal output pin (active-low)
8-bit counter borrow signal output pin (active-low)
8-bit counter reset signal output pin
Counter is reset when this pin is “H”.
Count data output control signal input pin
Counter data output latch signal. Data is latched on the fall of STB, and is held while
STB = “L”.
Power supply input pin
Ground pin
Phase
8-Bit Up/Down Counter
3-State Output
8-Bit Latch
Function
Carry
Borrow
STB
OE
CD
0–7
PD4704