HT1650(2005) Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT1650 Datasheet PDF : 18 Pages
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HT1650
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
09H
0AH
0BH
Bit0
Bit1
Bit2
Bit3
SEG2
0CH 10H - - - - - - - 12CH 130H 134H 138H 13CH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0DH 11H - - - - - - - - - 12DH 131H 135H 139H 13DH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0EH 12H - - - - - - - - - 12EH 132H 136H 13AH 13EH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0FH 13H - - - - - - - - - 12FH 133H 137H 13BH 13FH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
SEG3
SEG76 SEG77 SEG78 SEG79
80´16 Selection Mode RAM Mapping Table
Name
Command Code
Function
80´16 Mode
X100-0001-1111-XXXX
Change segment from 64 to 80 and common from 32 to 16
The default value after power ON reset is 64´32 mode, set ²Normal² command will change 80´16 mode to 64´32
mode.
Frame Frequency
The HT1650 provides three kinds of frame frequency options 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. 1.20
9
November 10, 2005
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