AK7600 Datasheet, PDF (23/38 Pages) Asahi Kasei Microsystems – 2/6-Channel Audio CODEC with Digital EQ

[AK7600]
■ Read Sequence
In the AK7600, when a “write- slave-address assignment” is received at the first byte, the command is send from micro
controller in the second byte. When the slave address is received after the start condition, the AK7600 starts outputting the
data regarding to command code.
When cancelling read operation before the AK7600 sends all data, assure that a “not acknowledged” signal is received by
the AK7600. If this “not acknowledged” signal is not received, the AK7600 continues to send data until specified number,
and since it did not release the BUS, the stop condition cannot be properly received.
Usable command codes in read sequence are listed in Table 4
S
SLAD W A Cmd A rS SLAD R A Data A Data Na Stp
repeat N times * Cancel
Figure 21. Read Sequence
Command Code
Data Length Content
40H ~ 4AH
16bit×5 16bit Coefficient; Delay Time Read
80H ~ 89H
32bit×5 28bit Coefficient; Data Read
01H, 02H, 03H
8bit
Control Register Read
C1H, C2H, C3H, C4H, C5H, C6H, C7H
16bit
Spectrum Analyzer Data Read
Table 4. List of Usable Read Command Codes in Read Sequence
MS0999-E-00
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2008/09