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ISD4002 参数 Datasheet PDF下载

ISD4002图片预览
型号: ISD4002
PDF下载: 下载PDF文件 查看货源
内容描述: 单芯片语音记录/播放设备120- , 150- , 180-和240 -二时长 [Single-Chip Voice Record/Playback Devices 120-, 150-, 180-, and 240-Second Durations]
分类和应用:
文件页数/大小: 38 页 / 396 K
品牌: WINBOND [ WINBOND ]
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ISD4002 SERIES  
PIN NAME  
PIN NO.  
FUNCTION  
SOIC /  
TSOP  
PDIP  
VCCA / VCCD  
18 / 27  
26 / 7  
Supply Voltage: To minimize noises, the analog and digital  
circuits in the ISD4002 devices use separate power  
busses. These +3V busses are brought out to separate  
pins and should be tied together as close to the supply as  
possible. In addition, these supplies should be decoupled  
as close to the package as possible.  
RAC  
24  
2
Row Address Clock: This is an open drain output that  
provides the signal of a ROW with a 200 ms period for 8  
KHz sampling frequency. (This represents a single row of  
memory) This signal stays HIGH for 175 ms and stays  
LOW for 25 ms when it reaches the end of a row.  
The RAC pin stays HIGH for 109.37 µsec and stays LOW  
for 15.63 µsec in Message Cueing mode (see Message  
Cueing section for detailed description). Refer to the AC  
Parameters table for RAC timing information at other  
sample rates.  
When a record command is first initiated, the RAC pin  
remains HIGH for an extra TRACL period. This is due to the  
need of loading the internal sample and hold circuits in the  
device. This pin can be used for message management  
techniques.  
A pull-up resistor is required to connect to other device.  
25  
5
Interrupt: This is an open drain output pin. This pin goes  
LOW and stays LOW when an Overflow (OVF) or End of  
Message (EOM) marker is detected. Each operation that  
ends with an EOM or OVF will generate an interrupt. The  
interrupt will be cleared the next time an SPI cycle is  
initiated. The interrupt status can also be read by an RINT  
instruction.  
INT  
A pull-up resistor is required to connect to other device.  
Overflow Flag (OVF) – The Overflow flag indicates that the  
end of memory has been reached during a record or  
playback operation.  
End of Message (EOM) – The End of Message flag is set  
only during playback operation when an EOM is found.  
There are eight EOM flag position options per row.  
Publication Release Date: October 26, 2005  
- 9 -  
Revision 1.3