14
5.2 Interface Specifications
1) Parallel Interface
①
Specifications
Data Input : 8 bit simple centronics
Hand Shake : STB, BUSY, ACK
②
Hand Shake Timing ( Unit :
μ
sec )
③
Input/Output Signal Level
Standard Value
Item
Symbol
MIN TYP MAX
Unit
Input “Low” Level Voltage
V
IL
0
-
0.8
V
Input “High” Level Voltage
V
IH
2.0
-
Vcc
V
Output “Low” Level Voltage
V
OL
-
-
0.4
V
Output “High” Level Voltage
V
OH
2.4
-
- V
DATA
T1
T2 T3
T5
T6
T7
BUSY
ACK
T4
STB