EM73P361AH Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM73P361AH

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

EM73P361A

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

• Capacitor divider

1.5V

VA VEE

VDD

VB VSS

0.1F

3V

LCD DISPLAY OPERATION

• Resistor divider

VA VEE

VDD

VB VSS

3V

The LCD programming method is I/O mapping and P10~P12 are must be used.

Address register of LCD display buffer

It is a 5-bit register to specify address for LCD display buffer.

Port11

32 1 0

A4

Port10

32 1 0

A3 A2 A1 A0

Initial value :0000 0000

Data register of LCD display buffer

P12 is a 3-bit data register to read or write LCD display buffer.

Port12

32 1 0

D2 D1 D0

Initial value : 0000

TONE GENERATOR

EM73P361A has a built-in tone generator. It is a binary down counter. When the CPU is reseted or sleeping, the

tone generator is disabled and the output (P4.0/TONE) is high.

P23, P24

P30.0

Tone

XIN

generator

Tone generator command register

Port30 3 2 1 0

* * * SM

SM Sound generator mode

0 Tone generator disable

1 Tone generator enable

fo

High

Output

control

TONE

TONE

Initial value : 0000

* This specification are subject to be changed without notice.

12.17.2001 19

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