Muratec F-110 Field Engineering Manual page 56

4-2 OPE PBA
4-2-1 SUMMARY
OPE Board is separated functionally from the main board
and operated by the micom(HT48C5A) in the board. OPE
and the main use UART (universal asynchronous receiv-
er/transmitter) channel to exchange information. OPE reset
can be controlled by the main.
OPE micom controls key-scanning and LCD and LED dis-
play, detects documents and senses SCAN position. If there
occurs an event in OPE (such as key touch and sensor level
change), it sends specific codes to the main to respond to
the situation and the main analyzes these codes and oper-
ates the system.
For example, it the main is to display messages in OPE, the
main transmits data through UART line to OPE according to
the designated format and OPE displays this on LCD, LED.
OPE's sensing is also transmitted to the main through
UART line and then the main drives necessary operation.
Scan
Position
Sensor
Document
Detect
Sensor
Connector
MICOM
HT48C5A
UART
Reset
<OPE BLOCK DIAGRAM>
OPE PBA consists of U1(MICOM, HT48C5A),LCD, key
matrix, LED indicators, SCAN position sensor and the doc-
ument detect sensor. Refer to OPE Schematic Diagram and
Wiring Diagram sections of this manual.
• Display from the controller is received at U2 pin 47
(RX DATA).
• LCD drive signals are sent from P1-x pin group, P1-4~P1-
14 pins.
• Machine status LED drive signals are sent from U2
LED0~LED4.
• Document detect sensor output is received at U2 pin 1.
• Scan position sensor output is received at U2 pin7
11
7
X
Y 8
Circuit Description
RESONATOR
7.37 MHz
LCD
16x 1Line
Key Matrix
LEDs
4-23