Avery Dennison ALS 204 Service And Installation Manual page 130

7 E
LECTRONICS
7.3 C
IRCUIT BOARDS
Block diagram
+5V
+5V
+5V
Vo
(contrast)
MISO 1
VCC 2
SCK 3
MOSI 4
RST\ 5
Program & Debug (SPI)
GND 6
prog / debug
Reset\
Molex 53398-0671
(OD)
+5V
VCC 1 I2C-Bus
SCL 2
SDA 3
GND 4
I2C-Bus
Molex 53398-0471
.H\ 
'2:1
[132] Block diagram of operator panel
D
ESCRIPTION
21
67$786
Display 128 x 32 dots
Y
/(' JUHHQ 21
Status
/(' UHG (5525
Sitronix ST 7920-0B
with extension segment driver
ST 7921
LCD controller / driver
with build in
GB code simplified Chinese
character set
PP PP PP PP PP
RST\
OD
0LFURFRQWUROOHU
VCC
PP
XTAL $70(/
ATmega 168-20AU
PP
16kBytes Flash
XTAL
TQFP32
GND IN
OD
IN IN IN IN
+5V
.H\ 
2.
130
A
Stand-By-Key
Display 128 x 32 dots
COM 32
SEG 128
+5V
RS485
transceiver
UART-TXD
UART-TXEN
UART-RXD
8$57
 N%DXG
SP491E
+5V
+5V
.H\ 
83
ALS
20X
256
1
2
back light
+5V
+5V
1
4k7
2
470R
3
line
4
termination
5
470R
6
4k7
+5V
.H\ 
(6&