AK2305 Datasheet, PDF (12/43 Pages) Asahi Kasei Microsystems – Dual PCM CODEC for ISDN TERMINAL ADAPTER

ASAHI KASEI
GCI(General Circuit Interface)
Interface used for ISDN. This data format is as below.
PCM data channel assignment for B1 and B2 is defined by SEL2B register.
CH0,1selection
SEL2B
0
1
CH0
B1
B2
CH1
Remarks
B2
Reset
B1
Note: BCLK is twice the PCM data rate.
BCLK is acceptable from 512kHz to 4096kHz.
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.
[AK2305]
FS0
BCLK
DX0
1234567812345678
DR0
Don’t
care
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Don’t
care
B1-CHANNEL(CH0)
<SEL2B=”0”>
B2-CHANNEL(CH1)
<SEL2B=”0”>
<Non Multiplex>
Not supported.
C0029-E-02
12
1999/8