MC145003FU View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC145003FU

128 Segment LCD Drivers CMOS

Motorola => Freescale 

APPLICATION INFORMATION

Figure 10 shows an interface example.

Example 1 shows a semi–automatic SPI Mode (only start and stop conditions are done in non–SPI Mode). Example 2 contains

the software to use HC11 with MC145003 in manual SPI Mode. Both examples use the same hardware connection.

VDD

1 kΩ

MOSI

MC68HC11 SCK

SS

VDD

A0 A1 A2

Din

DCLK

ENB

MC145003

OSC1

OSC2

R = 470 kΩ

BP1–BP4

1/4 MUX DISPLAY

FP1–FP32

Figure 10. Interface Example Between MC68HC11 and MC145003

CPOL = 0

CPHA = 0

SPI Off

EW = 0

Setup Start Condition with SPI off (Write Data Port to 0)

SPI On

< ldaa $73, staa $1028

Send Address Byte

$7E

Send 16 bytes of Data

SPI Off

< ldaa $33, staa $1028

DATA = 0

SPI Off

ENB = 1

CLK = 1

Allows the latch of data to the FP outputs

DATA = 1

Stop Condition

Example 1. Semi–Automatic SPI Method

MOTOROLA

MC145003 • MC145004

11

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