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HT1621B(48LQFP) 参数 Datasheet PDF下载

HT1621B(48LQFP)图片预览
型号: HT1621B(48LQFP)
PDF下载: 下载PDF文件 查看货源
内容描述: [Interface Circuit]
分类和应用: LTE
文件页数/大小: 19 页 / 177 K
品牌: HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
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HT1621  
Name  
TONE OFF  
TONE ON  
CLR TIMER  
CLR WDT  
XTAL 32K  
RC 256K  
ID  
Command Code  
D/C  
C
Function  
Turn off tone outputs  
Turn on tone outputs  
Def.  
1 0 0 0000-1000-X  
1 0 0 0000-1001-X  
1 0 0 0000-11XX-X  
1 0 0 0000-111X-X  
1 0 0 0001-01XX-X  
1 0 0 0001-10XX-X  
1 0 0 0001-11XX-X  
Yes  
C
C
Clear the contents of time base generator  
Clear the contents of WDT stage  
C
C
System clock source, crystal oscillator  
System clock source, on-chip RC oscillator Yes  
System clock source, external clock source  
C
EXT 256K  
C
LCD 1/2 bias option  
ab=00: 2 commons option  
ab=01: 3 commons option  
ab=10: 4 commons option  
BIAS 1/2  
BIAS 1/3  
1 0 0 0010-abX0-X  
1 0 0 0010-abX1-X  
C
C
LCD 1/3 bias option  
ab=00: 2 commons option  
ab=01: 3 commons option  
ab=10: 4 commons option  
TONE 4K  
TONE 2K  
IRQ DIS  
IRQ EN  
1 0 0 010X-XXXX-X  
1 0 0 011X-XXXX-X  
1 0 0 100X-0XXX-X  
1 0 0 100X-1XXX-X  
C
C
C
C
Tone frequency, 4kHz  
Tone frequency, 2kHz  
Disable IRQ output  
Enable IRQ output  
Yes  
Time base/WDT clock output:1Hz  
The WDT time-out flag after: 4s  
F1  
1 0 0  
101X-X000-X  
C
C
C
C
C
C
C
C
Time base/WDT clock output:2Hz  
The WDT time-out flag after: 2s  
F2  
1 0 0 101X-X001-X  
Time base/WDT clock output:4Hz  
The WDT time-out flag after: 1s  
F4  
1 0 0  
101X-X010-X  
Time base/WDT clock output:8Hz  
The WDT time-out flag after: 1/2s  
F8  
1 0 0 101X-X011-X  
1 0 0 101X-X100-X  
1 0 0 101X-X101-X  
1 0 0 101X-X110-X  
1 0 0 101X-X111-X  
Time base/WDT clock output:16Hz  
The WDT time-out flag after: 1/4s  
F16  
F32  
F64  
F128  
Time base/WDT clock output:32Hz  
The WDT time-out flag after: 1/8s  
Time base/WDT clock output:64Hz  
The WDT time-out flag after: 1/16s  
Time base/WDT clock output:128Hz  
The WDT time-out flag after: 1/32s  
Yes  
Yes  
TEST  
1 0 0 1110-0000-X  
1 0 0 1110-0011-X  
C
C
Test mode, user don¢t use.  
NORMAL  
Normal mode  
Note: X : Don,t care  
A5~A0 : RAM addresses  
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 source of the tone frequency and of the time base/WDT clock frequency can be derived from  
an on-chip 256kHz RC oscillator, a 32.768kHz crystal oscillator, or an external 256kHz clock. Calculation of the  
frequency is based on the system frequency sources as stated above. It is recommended that the host control-  
ler should initialize the HT1621 after power on reset, for power on reset may fail, which in turn leads to the mal-  
functioning of the HT1621.  
Rev. 1.70  
13  
June 29, 2005