Communication Circuits; Fig. 2.25 Segment Lcd And The Nju6432B Display Controller Connexion; Fig. 2.26 Nju6432B Display Controller Connexion - ELCOM Euro-500 Handy Series Service Manual

Euro-500TX Handy
The segment LCD has 96 segments and its NJU6432B controller is capable of controlling up to 106 seg-
ments.

Fig. 2.25 Segment LCD and the NJU6432B display controller connexion

CNN14
LCD-DATA
5
LCD-CLK
4
LCD-SEL
3
GND
2
VCC
1
DISPLAY
Note: If the ECR is powered from the internal accumulator only, it is recommended to turn off the backli-
ght.

2.3.4 Communication circuits

The ECR Euro-500TX Handy is equipped by default with communication circuits for PC, scanner, electronic
scales, and external keyboard.
Service manual
8888888888
U1
55
OSC
C1 R1
680p 47k
VCC
56
VDD
R2
47k
+ 57
C3 INH
10
C2
+
10
59
VSS
58
VCC
VLCD
LCD-SEL
60
CE
LCD-CLK 61
SCL
LCD-DATA
62
DN
64
COM1
COM1
COM2 63
COM2

Fig. 2.26 NJU6432B display controller connexion

U [V]
5
2.5
0
21
U [V]
5
2.5
0
U [V]
5
2.5
0
3.5
54
© Elcom, s. r. o.
1
t [ s]
42
2
15.8 17 32.8 t [ s]
3
14 17.5 t [ms]
21