APR6008 Aplus Integrated circuits Inc., APR6008 Datasheet - Page 10

• Manufacturer Part Number: APR6008
• Description: 8 Min. -- Recording & Playback Voice Ic
• Manufacturer: Aplus Integrated circuits Inc.

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
for digital storage.Other sectors, with the
exception of sector 639, 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
DIG_ERASE command on sector 639 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.
check-before-store methods. Issuing a
through 9 are tested and guaranteed
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10
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.
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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The TpSCLK specification
APR6008
ver1.3