AY0438P

更新时间： 2024-01-17 02:45:41

品牌	Logo	应用领域
美国微芯 - MICROCHIP		驱动器
页数	文件大小	规格书
11页	84K
描述
32-Segment CMOS LCD Driver

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技术参数
数据手册

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AY0438P 技术参数

是否无铅：	不含铅	生命周期：	Active
包装说明：	QCCJ,	Reach Compliance Code：	compliant
Factory Lead Time：	5 weeks	风险等级：	1.95
数据输入模式：	SERIAL	显示模式：	SEGMENT
接口集成电路类型：	LIQUID CRYSTAL DISPLAY DRIVER	JESD-30 代码：	S-PQCC-J44
复用显示功能：	NO	功能数量：	1
区段数：	32	端子数量：	44
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	QCCJ
封装形状：	SQUARE	封装形式：	CHIP CARRIER
最大供电电压：	8.5 V	最小供电电压：	3 V
标称供电电压：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子形式：	J BEND	端子位置：	QUAD
最小 fmax：	1.5 MHz	Base Number Matches：	1

AY0438P 数据手册

AY0438

1.4

General

1.5

Interfacing to a LCD Module and

PIC16CXX Device

In order to avoid any race conditions, the Data In and

Load signals should not be changed during a falling

edge of the Clock. Figure 4 and Figure 7 show a typical

timing diagram for a 32 segment and 64 segment LCD

module.

Figure 8 shows a typical layout of an AY0438 con-

nected to a LCD module and interfaced to a PIC16CXX

family device. Example 1 lists code used to program

the PIC16CXX device. This code was complied using

MPASM.

FIGURE 8: INTERFACING TO A LCD MODULE AND PIC16CXX DEVICE

SEG A

AY0438

SEG1

LCD

Backplane

SEG F

SEG G

SEG E

SEG7

SEG6

SEG5

SEG D

SEG C

SEG B

PIC16CXX

SEG4

SEG3

SEG2

RB0

Clock

Data In

Load

SEG9-15

SEG19-23

SEG25-31

Backplane

RB1

RB2

RB7

LCDΦ

EXAMPLE 1:

EXAMPLE CODE

;*************************************************************************

;This program shows an interface between a PIC16CXX device

;and the AY0438 LCD controller to control a 7 Segment

;4 digit LCD module.

;The PIC16CXX interface to the AY0438 Hardware:

;

PORTB bit 0 --> CLK

PORTB bit 1 --> DATA IN

PORTB bit 2 --> LOAD

;The LCD module is connected to the AY0438 as follows:

;

Most Significant digit --> seg1 to seg7

3rd Significant digit

2nd Significant digit

--> seg9 to seg15

--> seg17 to seg 23

Least Significant digit --> seg25 to seg 31

DS70010I-page 4

1995 Microchip Technology Inc.

1 2 345 6 7...11

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