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HT1650
(Rev.:2005)

64x32 LCD Controller for I/O MCU

Holtek Semiconductor 

HT1650

Instruction Set Summary

Name

Command Code

D/C

Function

Def.

READ

A8110-A7A6A5A4A3A2A1A0D3D2D1D0 D Read data from the RAM

WRITE

A8101-A7A6A5A4A3A2A1A0D3D2D1D0 D Write data to the RAM

READ-MODIFY-

WRITE

A8101-A7A6A5A4A3A2A1A0D3D2D1D0

D Read from and Write data to the RAM

SYS DIS

X100-0000-0000-XXXX

C

Turn Off both

generator

system

oscillator

and

LCD

bias

Yes

SYS EN

X100-0000-0001-XXXX

C Turn On system oscillator

LCD OFF

X100-0000-0010-XXXX

C Turn Off LCD display

Yes

LCD ON

X100-0000-0011-XXXX

C Turn On LCD display

TIMER DIS

X100-0000-0100-XXXX

C Disable time base output

Yes

WDT DIS

X100-0000-0101-XXXX

C Disable WDT time-out flag output

Yes

TIMER EN

X100-0000-0110-XXXX

C Enable time base output

WDT EN

X100-0000-0111-XXXX

C Enable WDT time-out flag output

TONE OFF

X100-0000-1000-XXXX

C Turn Off tone outputs

Yes

CLR TIMER

X100-0000-1101-XXXX

C Clear the contents of the time base generator

CLR WDT

X100-0000-1111-XXXX

C Clear the contents of the WDT stage

TONE 4K

X100-0001-0000-XXXX

C

Turn on tone output, tone frequency output:

4kHz

TONE 2K

X100-0001-0001-XXXX

C

Turn on tone output, tone frequency output:

2kHz

IRQ DIS

X100-0001-0010-XXXX

C Disable IRQ output

Yes

IRQ EN

X100-0001-0011-XXXX

C Enable IRQ output

RC 32K

X100-0001-0100-XXXX

C System clock source, on-chip RC oscillator Yes

EXT (X¢TAL)

X100-0001-0101-XXXX

C

System clock source, external 32kHz clock

source or crystal oscillator 32.768kHz

LARGE BIAS X100-0001-0110-XXXX

C Large bias current option

Yes

MIDDLE BIAS X100-0001-0111-XXXX

C Middle bias current option

SMALL BIAS X100-0001-1000-XXXX

C Small bias current option

BIAS 1/6

X100-0001-1010-XXXX

C LCD 1/6 bias option

Yes

BIAS 1/5

X100-0001-1001-XXXX

C LCD 1/5 bias option

FRAME 170Hz X100-0001-1100-XXXX

C Selects 170Hz frame frequency

FRAME 89Hz X100-0001-1101-XXXX

C Selects 89Hz frame frequency

FRAME 64Hz X100-0001-1110-XXXX

C Selects 64Hz frame frequency

Yes

Select 80´16 X100-0001-1111-XXXX

C

This command will change segment from 64

to 80 and command from 32 to 16

F1

X100-1010-0000-XXXX

C

Time base clock output: 1Hz

The WDT time-out flag after 4s

F2

X100-1010-0001-XXXX

C

Time base clock output: 2Hz

The WDT time-out flag after 2s

F4

X100-1010-0010-XXXX

C

Time base clock output: 4Hz

The WDT time-out flag after 1s

Rev. 1.20

15

November 10, 2005

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