Sharp ER-A530 D Conversion KEY/DISPLAY, Printer Head Temperature Monitor, Reference Voltage

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5. A/D CONVERSION

6. KEY/DISPLAY

In the ER-A520/530, the following three kinds of signals are inputted to the A/D conversion port.

<CPU PORT>

No.

CPU PORT

Signal to

Function

be used

 

 

 

 

 

 

 

130

AN0

TM

PRINTER HEAD TEMPERATURE

 

 

 

MONITOR

 

 

 

 

138

AN1

VPTEST

PRINTER HEAD VOLTAGE MONI-

 

 

 

TOR

 

 

 

 

137

AN2

VREF

REFERENCE VOLTAGE

 

 

 

 

5-1. PRINTER HEAD TEMPERATURE MONITOR

A voltage divided by the temperature detection thermistor of the printer head and the resistor is inputted to AN0 pin.

The printer head conduction must be controlled as shown below.

HEAD

A/D CONVERSION

OPERATION

TEMPERATURE

VALUE (DEC)

 

 

 

 

-10°C or below

929~1023

MOTOR LOCK

 

 

 

-10°C ~ 0°C

869~928

PRINT IN ENERGIZING

 

 

TIME AT 0°C

 

 

 

0°C ~ 70°C

232~868

PRINT FOR CONDUCTION

 

 

TIME SPECIFIED ON PR-

 

 

58H CONTROL SPEC.

 

 

 

70°C or above

0~231

MOTOR LOCK

 

 

 

5-2. PRINTER HEAD VOLTAGE MONITOR

A voltage is supplied by the printer head power source, passed through the printer, and divided by the resistor is inputted to AN1 pin.

The A/D conversion value must be read after turning VHCOM signal (CPU P106) to "H" and stabilizing the voltage (after 10msec).

The printable voltage range of the printer is 15V~26V. The voltage is calculated from the AN1 value and the A/D conversion value of the ref- erence voltage.

5-3. REFERENCE VOLTAGE

The reference voltage (2.495Vm0.085V) generated by KIA431F is input- ted to AN2 pin.

469 (DEC) t VREF t 557 (DEC)

VREF 469 (DEC) corresponds to VREF = 2.41V at VCC = 5.25V

VREF 557 (DEC) corresponds to VREF = 2.58V at VCC = 4.75V

6-1. LCD CONTROL

LCD control is same as the ER-A275P.

LCD-related Register

 

Function

 

Address

 

R/W

 

 

 

 

 

 

 

 

 

 

 

 

LCD Write Data

 

 

 

 

 

 

100001h

 

W

 

 

 

 

 

 

 

 

 

 

 

 

LCD Read Data

 

 

 

 

 

 

100001h

 

R

 

 

 

 

 

 

 

 

 

 

 

 

<CPU PORT>

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No.

CPU PORT

 

Signal to

 

Function

 

 

be used

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

90

P120

 

BLON

LCD BACK LIGHT ON SIGNAL

 

 

 

 

 

 

 

 

 

 

89

P121

 

LCDON

LCD ON SIGNAL

 

 

 

 

 

 

 

 

 

 

 

88

P122

 

 

LRS

LCD RS SIGNAL

 

 

 

 

 

 

 

 

 

 

 

87

P123

 

LR/W#

LCD R/W# SIGNAL

 

 

 

 

 

 

 

 

 

 

 

86

P124

 

 

LE

LCD E SIGNAL

 

 

 

 

 

 

 

 

 

 

 

85

P125

 

DATALE

LCD WRITE DATA LATCH

 

 

 

 

 

 

 

 

 

 

 

 

 

P125:

LWDL

 

 

 

 

 

 

 

 

 

 

L : LCD write data latch

 

 

 

 

P124:

E

 

 

 

 

 

 

 

 

 

 

Enable Signal

 

 

 

 

 

Enable

 

 

 

 

 

 

 

 

P123:

R/W#

 

 

 

 

 

 

 

 

 

 

H: Data read

L: Data Write

 

P122

LRS

 

 

 

 

 

 

 

 

 

 

H: Data input

L: Instruction Input

 

DATA WRITE (CPU 3 LCD)

LRS

LR/W#

LE

DB0-7

Valid Data

LWDL

 

P122 "x"

100001h P124 "H" P124 "L" P123 "H"

P123 "L"

DATA

 

WRITE

DATA READ (CPU 1 LCD)

LRS

LR/W#

LE

DB0-7

Valid Data

LWDL

 

P122 "x"

P125 "H" P124 "H" 100001h P124 "L" P125 "L"

P123 "H"

DATA

 

READ

When the read busy flag of the LCD display remains busy for more than 500ms, turn off LCDON (P121) for 1ms and perform initializing.

ER-A520U/ER-A530U HARDWARE DESCRIPTION

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Contents ER-A520 Model ER-A530 Specifications AppearanceRating KeyboardCancel SlipDEPT# CONV2 ~ CONV4Mode Switch Mode Switch and Mode KeysDisplay PrinterDrawer Options 1.OPTIONSMaster Reset and Program Reset Master ResetProgram Reset Master ResetBlock Diagram Memory MAP Hardware DescriptionAddress MAP CPU PIN Table RTS3# Drive Signal RTS4# Drive SignalAN0 Temperature Monitor AN6 Power CON TrolPrinter Control Stepping Motor ControlHead Control Other PortsPrinter Head Temperature Monitor D Conversion KEY/DISPLAYPrinter Head Voltage Monitor Reference VoltageKEY/DISPLAY Scan Power Flash Memory Rewrite ProcedureSerial I/O DisplayReset Ristrictions on Print RatioBuzzer Diagnostic Program Test ItemsDescription of Each Diag Program Display Buzzer TestMode Switch Test Printer TestKeyboard Test Printer Sensor TestClock Test Drawer 1 Open & Sensor TestDrawer 2 Open & Sensor Test LCD CG TestStandard RAM Test Option RAM TestCPU Internal RAM Test AD Conversion Port Test16POLE Display Test Flash ROM Test19SCANNER Test RS TestIPL from EP-ROM ROM Copy GND VCCIPL ROM Circuit Diagram and PWB Layout CPUSram / from / Eprom / Poff 16M Flash ROMLCD I/F / KEY I/F Printer Driver RS232C Driver / UP-P16DP CN Option RAM Connector / Printer Connector / Drawer DRAWER1+5V, Vled ER-A520U/ER-A530U Circuit Diagram and PWB Layout ER-A520U/ER-A530U Circuit Diagram and PWB Layout ER-A520U/ER-A530U Circuit Diagram and PWB Layout Copyright  2004 by Sharp Corporation Sharp Corporation

ER-A520, ER-A530 specifications

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