AK2305 Datasheet, PDF (13/43 Pages) Asahi Kasei Microsystems – Dual PCM CODEC for ISDN TERMINAL ADAPTER

ASAHI KASEI
IDL(Interchip Digital Link)
Interface used for ISDN. This data format is as below.
PCM data channel assignment for B1 and B2 channel is defined by SEL2B register.
CH0,1selection
SEL2B
0
1
CH0
B1
B2
CH1
Remarks
B2
Reset
B1
Note: BCLK is same as the PCM data rate.
BCLK is acceptable from 256kHz to 4096kHz.
[AK2305]
INTERFACE TIMING
<2ch Multiplex>
PCM data of each channel is interfaced through DR0/DX0 pin in 8bits format.
They are accommodated in 1 frame(125us) which synchronizes with FS0.
FS0
BCLK
DX0
DR0
Don’t
care
1 2 3 4 5 6 78
12345678
B1-CHANNEL(CH0)
<SEL2B=”0”>
Don’t
care
1 2 3 4 5 6 78
1
2
3
4
5
6
7
8
Don’t
care
B2-CHANNEL(CH1)
<SEL2B=”0”>
<Non Multiplex>
Not supported.
C0029-E-02
13
1999/8