Preliminary

APR6016 Data Sheet

Voice Recording & Playback Device

Page 11

Revision 1.0

Reading Digital Data

Digital data is read from the device using the DIG_READ

command. To read data you must send a DIG_READ com-

mand immediately followed by 3012 don’t care bits during the

same /CS cycle. The data previously stored in the specified

sector will begin to appear on the DO pin after the current

device status or SID and four buffer bits. The next 3004 bits

are the previously stored data. The first bit shifted out is the

first bit that was written. The last bit shifted out is the last bit

that was written. There are four random don’t care bits follow-

ing the 3004 bits of user data.

An incomplete read of the sector is allowed. An incomplete

read is defined a a read with less than 3032 clock cycles. All

incomplete read cycles require one extra SCLK cycle after

the /CS signal returns high.

Figure 12 shows a timing diagram which describes the entire

process for a complete sector read. All timing with the excep-

indicates when a DIG_READ is taking place.

Figure 12 Reading Digital Data

/C S

SCLK

DI

DO

DIG_READ COMMAND

3012 don’t Care Bits

Total 3032 clock cycles

SID or CDS

3004 bits of previously stored data

XX

X

X

XX

X

X

/BUSY