Marquette Hellige GmbH
MicroSmart V 2.xx
Page 29
Servicing Instructions 227 470 35 B - 97.12
3.4.2 Interface, display
Plug designation:
AE/
Socket connector
1 x 14-pin, upright
(180 °)
,
reverse voltage protection implemented mechanically.
The function of the individual pins is shown in the following table. The definition in terms of
input/output is as seen from the PCB MicroSmart.
Signal name
I/O
Meaning
Level
Polarity
Pin No.
Vss
---
Ground
0V
---
1
VDD
---
Supply
+5V
---
2
V0
---
Contrast voltage
0-5V
---
3
RS
O
Register select
TTL
4
R/W
O
Read/Write
TTL
---
5
E
O
Enable
TTL
active-high
6
DB8
I/O
Data
TTL
---
7
DB9
I/O
Data
TTL
---
8
DB10
I/O
Data
TTL
---
9
DB11
I/O
Data
TTL
---
10
DB12
I/O
Data
TTL
---
11
DB13
I/O
Data
TTL
---
12
DB14
I/O
Data
TTL
---
13
DB15
I/O
Data
TTL
---
14
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