APR6016 Просмотр технического описания (PDF) - APLUS INTEGRATED CIRCUITS

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APR6016

16 min. -- Recording & Playback Voice IC

APLUS INTEGRATED CIRCUITS 

INTEGRATED CIRCUITS INC.--APR6016

Writing Digital Data

Digital data is written into the device using the

DIG_WRITE command. No mixing of analog data

and digital data within a sector is possible.

Sectors 0 through 9 are tested and

guaranteed for digital storage.Other sectors,

with the exception of sector 1279, can store

data but have not been tested and are thus

not guaranteed to provide 100% good bits.

This can be managed with error correction or

forward check-before-store methods. Issuing a

DIG_ERASE command on sector 1279 will cause

data throughout all sectors to be lost.

A sector must be erased, using the DIG_ERASE

command, before digital data can be written to it.

This requirement is necessary whether analog data

or digital data was previously stored in the sector. A

sector should not be erased more than once

between analog and digital write operations.

Executing multiple erase operations on a sector will

permanently damage the sector. A sector can be

reallocated to either analog storage or digital

storage at any time.

The process of storing digital data begins by

sending a DIG_WRITE command. The

DIG_WRITE command is followed immediately by

four buffer bits. These bits will not be stored in the

array and must be considered don't care bits.

Immediately following the four buffer bits should

be the data that you wish to store. All 3004 bits

must be stored.Four additional buffer bits must be

clocked into the device following the stored data.

These bits will not be stored in the array and must

be considered don't care bits.Ending a digital write

command early will permanently damage the

sector.

The DO pin will clock out the normal 20 bit CDS

followed by five don't care bits, a copy of the 3004

data bits, and finally three don't care bits.

Figure 11 shows a timing diagram, which

describes the digital storage process. All timing

with the exception of TpSCLK should adhere to

the specifications given in Figure 4 and Figure 7.

The TpSCLK specification is replaced by the

DTpSCLK when storing digital data.

Note: The DIG_ERASE command should not be

used before storing analog data. The device will

perform its own internal erase before analog

storage.

Figure 11 does not show the DIG_ERASE

command,which must be executed on a sector

before digital data can be stored.

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