ak7714 AKM Semiconductor, Inc., ak7714 Datasheet - Page 27

• Manufacturer Part Number: ak7714
• Description: 20-bit Audio Codec With Dsp And Delay Ram
• Manufacturer: AKM Semiconductor, Inc.

[ASAHI KASEI]
(5) Audio data interface (internal connection mode )
The serial audio data pins SDIN1, SDIN2 and SDOUT (OPCL = L: Internal connection mode) are interfaced with the
external system, using LRCLK and BITCLK. The data format is the first MSB of the 2's complement. Normally, the
input/output format, in addition to the standard format used by AKM, can be changed to the I 2 S compatible mode by
setting the control register C0 to 1. (In this case, all input/output audio data pin interface is in the I 2 S compatible mode.)
The input SDIN1 and SDIN2 formats are adjusted (24 bits) at initialization. Setting the control registers C2 and C1 will
cause them to be compatible with 24 bits, 20 bits and 16 bits. (Note: C0 = 0)
However, inidividul setting of SDIN1 and SDIN2 is not allowed.
The output SDOUT is fixed at 24 bits.
describe 64fs examples.
1) Standard input format (C0 = 0: initial set value)
a) Mode 1 (C2, C1 = 0, 0: Initial set value)
b) Mode 2, Mode 3 and Mode 4
M0018-E-00
At slave mode BITCLK corresponds to not only 64fs but also 48fs. But, we recommend 64fs. Following formats
SDIN1 and 2
SDIN1 and 2
SDIN1 and 2
SDIN1, 2
Mode 4
When you want to input the MSB-first 20-bit data into SDIN1 and 2, input four "0s" following the LSB.
Mode 2: (C2, C1) = (0, 1) 24 bits
Mode 3: (C2, C1) = (1, 0) 20 bits
Mode 4: (C2, C1) = (1, 1) 16 bits
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[AK7714]
‘98/07