HT1670

Rev. 1.60

10

November 9, 2010

PATENTED

00H

04H

08H

0CH

10H --------- 22CH

230H

234H

238H

23CH

COM0

Bit0

Bit0

Bit0

Bit0

Bit0

Bit0

COM1

Bit1

Bit1

Bit1

Bit1

Bit1

Bit1

COM2

Bit2

Bit2

Bit2

Bit2

Bit2

Bit2

COM3

Bit3

Bit3

Bit3

Bit3

Bit3

Bit3

01H

05H

09H

0DH

11H --------- 22DH

231H

235H

239H

23DH

COM4

Bit0

Bit0

Bit0

Bit0

Bit0

Bit0

COM5

Bit1

Bit1

Bit1

Bit1

Bit1

Bit1

COM6

Bit2

Bit2

Bit2

Bit2

Bit2

Bit2

COM7

Bit3

Bit3

Bit3

Bit3

Bit3

Bit3

02H

06H

0AH

0EH

12H --------- 22EH

232H

236H

23AH

23EH

COM8

Bit0

Bit0

Bit0

Bit0

Bit0

Bit0

COM9

Bit1

Bit1

Bit1

Bit1

Bit1

Bit1

COM10

Bit2

Bit2

Bit2

Bit2

Bit2

Bit2

COM11

Bit3

Bit3

Bit3

Bit3

Bit3

Bit3

03H

07H

0BH

0FH

13H --------- 22FH

233H

237H

23BH

23FH

COM12

Bit0

Bit0

Bit0

Bit0

Bit0

Bit0

COM13

Bit1

Bit1

Bit1

Bit1

Bit1

Bit1

COM14

Bit2

Bit2

Bit2

Bit2

Bit2

Bit2

COM15

Bit3

Bit3

Bit3

Bit3

Bit3

Bit3

SEG0

SEG1

SEG2

SEG3

SEG140 SEG141 SEG142 SEG143

144

´16 Selection Mode RAM Mapping Table

Name

Command Code

Function

144

´16 Mode

X100-0001-1111-XXXX

Change segment from 144 to 96 and common from 32 to 16

The default value after power ON reset is 128

´32 mode, set ²Normal² command will change 144´16 mode to 128´32

mode.

Frame Frequency

HT1670 provides three kinds of frame frequency option by command code; 64Hz, 89Hz and 170Hz respectively. FRAME

64Hz provides 64Hz frame frequency. FRAME 89Hz provides 89Hz frame frequency. FRAME 170Hz provides 170Hz

frame frequency.

Name

Command Code

Function

FRAME 170Hz

X100-0001-1000-XXXX

Select 170Hz frame frequency

FRAME 89Hz

X100-0001-1101-XXXX

Select 89Hz frame frequency

FRAME 64Hz

X100-0001-1110-XXXX

Select 64Hz frame frequency

Frame Frequency Selection Command Code

Time Base and Watchdog Timer

- WDT

The time base generator and WDT share the same counter which is divided by 256. The IRQ clock can be programmed as

1Hz, 2Hz, ...., 128Hz output. TIMER DIS/EN/CLR, WDT DIS/EN/CLR and IRQ EN/DIS are independent from each other.

Once the WDT time-out occurs, the IRQ pin will remain at a logic low level until the CLR WDT or the IRQ DIS command

is issued.

If an external clock is selected as the system frequency source, the SYS DIS command turns out invalid and the power

down mode fails to be carried out until the external clock source is removed.