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

– 11 –

Page 12
Image 12
Sharp ER-A530 D Conversion KEY/DISPLAY, Printer Head Temperature Monitor, Printer Head Voltage Monitor, Reference Voltage

ER-A520, ER-A530 specifications

The Sharp ER-A530 and ER-A520 are advanced electronic cash registers designed to cater to the needs of small and medium-sized businesses. These models are known for their reliability, user-friendly interfaces, and robust features that enhance operational efficiency in retail environments.

One of the most prominent features of the ER-A530 and ER-A520 is their advanced transaction processing capabilities. Equipped with a high-speed thermal printer, these registers ensure quick and efficient printing of receipts, which is essential for maintaining customer satisfaction during busy hours. The print quality is clear and legible, providing customers with a professional receipt that reflects the brand's identity.

Both models boast an intuitive and ergonomic keypad layout, making it easy for staff to learn and operate the register with minimal training. The bright and easy-to-read LCD display is another key characteristic, allowing operators to view transaction details clearly in various lighting conditions. This user-friendly design reduces errors and speeds up the checkout process, making it ideal for busy retail settings.

In terms of storage capacity, the Sharp ER-A530 and ER-A520 can handle a substantial number of PLUs (Price Look Up codes), accommodating a wide range of products and services. This extensive capability is particularly beneficial for businesses with a diverse inventory, as it enables quick access to pricing and product information without needing to enter details manually for every sale.

Connectivity is another strong point for these registers. The ER-A530 and ER-A520 support various peripheral devices, including barcode scanners, cash drawers, and kitchen printers. This versatility allows businesses to create a more streamlined checkout process, enhancing overall operational efficiency.

Additionally, both models include advanced reporting features that allow business owners to track sales trends, monitor inventory levels, and analyze performance over time. This analytical capability is crucial for making informed decisions about inventory management, staffing, and sales strategies.

Moreover, the security features in the ER-A530 and ER-A520 ensure that sensitive financial data is protected. With password-protected access to programming and certain functions, businesses can safeguard against unauthorized use while maintaining a secure environment for transactions.

In summary, the Sharp ER-A530 and ER-A520 electronic cash registers stand out in the market for their reliable performance, user-friendly design, and a comprehensive set of features that accommodate the unique needs of retailers. These registers not only enhance customer service but also provide critical insights for inventory and sales management, making them an excellent choice for businesses looking to streamline their operations.