HT1670 Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT1670 Datasheet PDF : 20 Pages
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PATENTED
HT1670
COM0
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
COM9
COM10
COM11
COM12
COM13
COM14
COM15
00H
Bit0
Bit1
Bit2
Bit3
01H
Bit0
Bit1
Bit2
Bit3
02H
Bit0
Bit1
Bit2
Bit3
03H
Bit0
Bit1
Bit2
Bit3
SEG0
04H
Bit0
Bit1
Bit2
Bit3
05H
Bit0
Bit1
Bit2
Bit3
06H
Bit0
Bit1
Bit2
Bit3
07H
Bit0
Bit1
Bit2
Bit3
SEG1
08H
Bit0
Bit1
Bit2
Bit3
09H
Bit0
Bit1
Bit2
Bit3
0AH
Bit0
Bit1
Bit2
Bit3
0BH
Bit0
Bit1
Bit2
Bit3
SEG2
0CH 10H - - - - - - - - - 22CH 230H 234H 238H 23CH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0DH 11H - - - - - - - - - 22DH 231H 235H 239H 23DH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0EH 12H - - - - - - - - - 22EH 232H 236H 23AH 23EH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0FH 13H - - - - - - - - - 22FH 233H 237H 23BH 23FH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
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.
Rev. 1.60
10
November 9, 2010
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