HT45F43 datasheet(96/152 Pages) HOLTEK

номер детали	HT45F43

подробное описание детали	8-Bit Flash MCU with Op Amps & Comparators

PDF	152 Pages

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производитель	HOLTEK [Holtek Semiconductor Inc]

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SCOM Function for LCD

The devices have the capability of driving external LCD panels. The common pins for LCD driving,

SCOM0~SCOM3, are pin shared with certain pin on the PA0, PC4~PC6 pins. The LCD signals (COM

and SEG) are generated using the application program.

LCD Operation

An external LCD panel can be driven using this device by configuring the PA0 and PC4~PC6 pins as

common pins and using other output ports lines as segment pins. The LCD driver function is

controlled using the LCDC register which in addition to controlling the overall on/off function also

controls the bias voltage setup function. This enables the LCD COM driver to generate the necessary

VDD/2 voltage levels for LCD 1/2 bias operation.

The LCDEN bit in the LCDC register is the overall master control for the LCD driver, however this bit

is used in conjunction with the COMnEN bits to select which I/O pins are used for LCD driving. Note

that the Port Control register does not need to first setup the pins as outputs to enable the LCD driver

operation.

The following block diagram illustrates the functional structure for LCD COM function.

LCDEN

COMnEN

Pin Function

O/P Level

I/O

0or1

I/O

0or1

SCOMn

Output Control

Rev. 1.20

September 15, 2011

HT45F23/HT45F43

8-Bit Flash MCU with Op Amps & Comparators

HT45F43 датащи(PDF) 96 Page - Holtek Semiconductor Inc