AK2510 데이터 시트보기 (PDF) - Asahi Kasei Microdevices
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AK2510 Datasheet PDF : 16 Pages
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ASAHI KASEI
[AK2510]
PCM INTERFACE
AK2510 supports 4 PCM data interface modes.
- A/u-Law PCM data mode( Long or Short frame)
This mode is for interface of 64kbps PCM data which are compressed /extended by A-law or u-law. Both Long
frame and short frame format are acceptable. The PCM data occupies the first time slot of the PCM data bus
which is specified by the frame sync signal. Please refer to the format diagram. A-law or u-law is selectable
via CPU register.
- 16 bit Linear data Mode
This mode is for the interfaces the 16 bit linear PCM data. PCM CODEC of AK2510 operates at 14 bit
accuracy. The 2 bits of the LSB are fixed in the 16 bit data stream.
- AK130 B1 Mode
This mode provides the PCM data Interface to AK130, the TCM transceiver for PBX/KTS system. PCM data
format is 64kbps A-law or u-law data. The timing between data and FS is different from the A/u -Law PCM
data mode written above. In this mode the PCM data are transmitted/received via B1 channel , one of the
PCM data channel of the AK130.
- AK130 B2 Mode
This mode provides the PCM data interface to AK130 B2 channel in the same manner as AK130 B1 Mode.
In every mode, the digital voice data are in and out from TIN, RIN, TOUT and ROUT pin respectively and the bit
clock and the 8KHz frame sync signal will be fed via BCLK and FS. And FS must be 8kHz clock that is
synchronized with BCLK. The order of PCM and linear data is MSB first.
Table 2-A Summary of PCM interface modes
Mode
PCM data
BCLK rate
format
A/u-Law PCM
data mode
A/u-Law
512k/2.048MHz
16bit Linear data
mode
16bit Linear
512k/2.048MHz
AK130 B1
A/u-Law
2.048MHz
mode
AK130 B2
A/u-Law
2.048MHz
mode
frame
signal
LF/SF auto select
SF only
AK130 FS signal
AK130 FS signal
Time
slot
1st Time slot
First 16 bit after FS
signal
B1 channel of AK130
B2 channel of AK130
1. Selection of the interface mode
These four interface modes are selectable through the CPU register which specified below.
A/u-Law is also selectable from the same CPU register and it is effective in the u/A -law PCM interface mode and
AK130 B1/B2 modes.
Register Name; Path Control 2
ADD
D7
D6
9
-
ALAW
Register Type : Read Write
D5
D4
D3
D2
PCM_1 PCM_0 MUTE1 MUTE0
Default
1
0
0
0
1
1
D1
VSMOD
E1
0
D0
VSMOD
E0
0
PCM_1、0 ； PCM interface mode select
PCM_1 PCM_0
Mode
0
0
A/u-Law PCM data mode
0
1
16bit Linear interface mode
1
0
AK130 B1 mode
1
1
AK130 B2 mode
ALAW ; PCM compress/Extend format select
ALAW
Compress/Extend
0
u-law
1
A-law
AKM
-8-
AK2510-E-00
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