HT1660(2003) View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
Manufacturer
HT1660 Datasheet PDF : 18 Pages
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HT1660
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
Bit3s
0BH
Bit0
Bit1
Bit2
Bit3
SEG2
0CH 10H- - - - - - - - - 1ACH 1B0H 1B4H 1B8H 1BCH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0DH 11H- - - - - - - - - 1ADH 1B1H 1B5H 1B9H 1BDH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0EH 12H- - - - - - - - - 1AEH 1B2H 1B6H 1BAH 1BEH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
0FH 13H - - - - - - - - - 1AFH 1B3H 1B7H 1BBH 1BFH
Bit0
Bit0
Bit0
Bit1
Bit1
Bit1
Bit2
Bit2
Bit2
Bit3
Bit3
Bit3
SEG3
SEG108 SEG109 SEG110 SEG111
112´16 Selection Mode RAM Mapping Table
Name
Command Code
Function
112´16 Mode
X100-0001-1111-XXXX
Change segment from 96 to 112 and common from 32 to 16
The default value after power ON reset is 96´32 mode, set ²Normal² command will change 112´16 mode to 96´32
mode.
Frame Frequency
HT1660 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. 1.00
10
September 16, 2003
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