HT1647A(2009) Ver la hoja de datos (PDF) - Holtek Semiconductor

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HT1647A
(Rev.:2009)

64x16 LCD Controller for I/O MCU

Holtek Semiconductor 

PATENTED

HT1647A

Name

IRQ DIS

IRQ EN

RC 32K

EXT (XTAL)

LARGE BIAS

MIDDLE BIAS

SMALL BIAS

BIAS 1/5

BIAS 1/4

Command Code

X100-0001-0010-XXXX

X100-0001-0011-XXXX

X100-0001-0100-XXXX

X100-0001-0101-XXXX

X100-0001-0110-XXXX

X100-0001-0111-XXXX

X100-0001-1000-XXXX

X100-0001-1001-XXXX

X100-0001-1010-XXXX

FRAME 170Hz X100-0001-1100-XXXX

FRAME 89Hz X100-0001-1101-XXXX

GRS LEVEL1

GRS LEVEL2

GRS LEVEL3

GRS LEVEL4

F1

X100-001 B4-B3 B2 B1 B0-XXXX

X100-010 B4-B3 B2 B1 B0-XXXX

X100-011 B4-B3 B2 B1 B0-XXXX

X100-100 B4-B3 B2 B1 B0-XXXX

X100-1010-0000-XXXX

F2

X100-1010-0001-XXXX

F4

X100-1010-0010-XXXX

F8

X100-1010-0011-XXXX

F16

X100-1010-0100-XXXX

F32

X100-1010-0101-XXXX

F64

X100-1010-0110-XXXX

F128

TEST

NORMAL

X100-1010-0111-XXXX

X100-1111-1111-XXXX

X100-1111-1110-XXXX

D/C

Function

Def.

C Disable IRQ output

Yes

C Enable IRQ output

C System clock source, on-chip RC oscillator Yes

C

System clock source, external 32kHz clock

source or crystal oscillator 32.768kHz

C Large bias current option

Yes

C Middle bias current option

C Small bias current option

C LCD 1/5 bias option

Yes

C LCD 1/4 bias option

Selects 170Hz frame frequency and active

C segment signal width can be divided into 13

sections

Selects 89Hz frame frequency and active

C segment signal width can be divided into 24 Yes

sections

C Sets PWM data in gray scale level 1

C Sets PWM data in gray scale level 2

C Sets PWM data in gray scale level 3

C Sets PWM data in gray scale level 4

C

Time base clock output: 1Hz

The WDT time-out flag after: 4s

C

Time base clock output: 2Hz

The WDT time-out flag after: 2s

C

Time base clock output: 4Hz

The WDT time-out flag after: 1s

C

Time base clock output: 8Hz

The WDT time-out flag after: 1/2s

C

Time base clock output: 16Hz

The WDT time-out flag after: 1/4s

C

Time base clock output: 32Hz

The WDT time-out flag after: 1/8s

C

Time base clock output: 64Hz

The WDT time-out flag after: 1/16s

C

Time base clock output: 128Hz

The WDT time-out flag after: 1/32s

Yes

C Test mode, user don¢t use.

C Normal mode

Yes

Note:

²X² stands for don¢t care

A8~A0: RAM address

D3~D0: RAM data

B4~B0: PWM data

D/C: Data/Command mode

Def.: Power-on reset default

All the bold forms, namely 1 1 0, 1 0 1, and 1 0 0, are mode commands. Of these, 1 0 0 indicates the command

mode ID. If successive commands have been issued, the command mode ID except for the first command will

be omitted. The tone frequency source and the time base/WDT clock frequency source can be derived from an

on-chip 32kHz RC oscillator, a 32.768kHz crystal oscillator, or an external 32kHz clock. Calculation of the fre-

quency is based on the system frequency sources as stated above. It is recommended that the host controller

should initialize the HT1647A after power-on reset, otherwise, power on reset may fail, which in turn leads to

the malfunctioning of the HT1647A.

Rev. 1.20

17

June 22, 2009

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