HT1670 Ver la hoja de datos (PDF) - Holtek Semiconductor

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Lista de partido

HT1670

128x32 LCD Controller for I/O MCU

Holtek Semiconductor 

PATENTED

HT1670

Name

Command Code

D/C

Function

Def.

F8

X100-1010-0011-XXXX-XXXX

C

Time base clock output: 8Hz

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

F16

X100-1010-0100-XXXX-XXXX

C

Time base clock output: 16Hz

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

F32

X100-1010-0101-XXXX-XXXX

C

Time base clock output: 32Hz

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

F64

X100-1010-0110-XXXX-XXXX

C

Time base clock output: 96Hz

The time-out flag after: 1/16s

F128

X100-1010-0111-XXXX-XXXX

C

Time base clock output: 128Hz

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

Yes

TEST

X100-1111-1111-XXXX-XXXX

C Test mode, user don¢t use.

NORMAL

X100-1111-1110-XXXX-XXXX

C Normal mode, 128´32 mode will be set

Yes

Note:

²X² stands for don¢t care

A9~A0: RAM address

D3~D0: RAM 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 HT1670 after power-on reset, otherwise, power on reset may fail, which in turn leads to the

malfunctioning of the HT1670.

Rev. 1.60

17

November 9, 2010

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