EMPCD081A Ver la hoja de datos (PDF) - ELAN Microelectronics

Número de pieza

componentes Descripción

Fabricante

EMPCD081A

8-Digit Calculator With Tax / Euro Function (Battery / Solar / Dual Power Type)

ELAN Microelectronics 

EMPCD081A

8-Digit Calculator With Tax / Euro Function (Battery / Solar / Dual Power Type)

3 Pin Descriptions

Symbol

COM1~3

A1 ~ A3

A4 ~ A13

B1 ~ B3

B4 ~ B13

C1 ~ C2

C3 ~ C13

VDD,VSS

VA,VB

VEE

TS1

RESET

K0 ~ K2

K3 ~ K7

K8 ~ K10

K11~K14

I/O

Function

O

LCD Common signal output.

O

LCD Segment signal output and strobe output for switch status.

O

LCD Segment signal output.

O

LCD Segment signal output and strobe output for switch status.

O

LCD Segment signal output.

O

LCD Segment signal output and strobe output for switch status.

O

LCD Segment signal output.

---

Positive and negative power supply pin.

---

Voltage doubler for LCD, connects a capacitor (0.1uF) between both pins.

---

LCD voltage from voltage doubler, connects a capacitor (0.1uF) to pin VDD.

I

Test pin input, be opened.

I

System reset / AC key input. (built-in schmitt trigger for debouncing)

O

Keyboard polling signal output pins.

I/O

Keyboard polling signal output and strobe input pins.

I

Keyboard strobe input pins.

I

Switch status strobe input pins.

4 Function Descriptions

A) Operation Characteristics

CONSTANT OPERATION

The EM34011 has implied constant mode on +, -, X, ÷ and % operations. The constant

is performed automatically by the "=" key, "%" key, or "%" key without a constant for

addition, subtraction and division while the first operand is the constant for

multiplication.

NUMBER ENTRY

Numbericals can be entered up to 8-digit.

MEMORY PROTECTION

In any error detection, the memory contents present before the error detection are

protected.

MEMORY INDICATION

If the memory contents are a number other than zero, "M" is indicated in the sign-digit

position.

AUTO POWER OFF

If no key is depressed for a specific period of time, the power supply will automatically

turn off .

2•

Product Specification (V0.3) 09.15.2004

(This specification is subject to change without further notice)

Share Link: