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APR6016 Datasheet(PDF) 8 Page - Aplus Intergrated Circuits |
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APR6016 Datasheet(HTML) 8 Page - Aplus Intergrated Circuits |
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8 / 24 page  Preliminary APR6016 Data Sheet Page 8 Voice Recording & Playback Device Revision 1.0 Receiving Device Information The device communicates data to the user by shifting out data on the DO pin. The device will shift out data according to the timing parameters given in figure 7. The device can shift out three different types of data streams: Device status, Sili- con ID, and user stored digital data. Device status and silicon ID are described in the next two sections. Retrieval of user data is described in the Reading Digital Data section. Figure 7 Data Out Timing Current Device Status (CDS) As described in the previous section, three different types of data streams are shifted out on the DO pin as data is shifted in on the DI pin. One of these streams is the current device status. The CDS will be shifted out unless the previous com- mand is SID command. Figure 8 shows the format of the CDS bit stream. The first bit shifted out, D0, is the Overflow flag. The Overflow flag is set to a binary 1 if an attempt was made to record beyond the available memory. The Overflow flag is set to a 0 if an overflow has not occurred. This flag is cleared after it has been read. The D1 bit is the End of Data flag. The EOD flag is set when the device stops playing, or fast forwarding as a result of an EOD bit in memory. The EOD flag is cleared after it has been read. The D2 bit is the Illegal Address flag. The Illegal Address flag is set whenever an ille- gal address is sent to the device. The D3 bit is the Lbat flag. This flag is set when the device senses a supply voltage below specification. The D4 bit is not used and should be ignored. The last fifteen bits represent the address of the cur- rent or last active sector. Figure 8 Format for CDS Bit Stream Op4 Op3 Op2 Op1 A1 A2 A0 /CS SCLK DI D0 D1 D2 D18 D17 D19 D16 D3 ~ ~ ~~ ~ ~ DO TfcsDO TfSCLK ThzD0 D15 ~~ A3 Lbat OVF EOD Illegal Address D0 D1 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D2 ~ ~ D19 First bit shifted out Last bit shifted out Sector Address Sector Address MSB Sector Address LSB |
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