AK2510 데이터 시트보기 (PDF) - Asahi Kasei Microdevices

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AK2510

Voice Switch LSI for Hands-Free Phone

Asahi Kasei Microdevices 

ASAHI KASEI

[AK2510]

2-2 16 bit Linear PCM data mode

In this mode the 16 bit linear PCM data are interfaced to the outside. This mode is useful to compress/extend the

PCM data using much higher compress rate algorithm than u/A-law algorithm by the external DSP. The AK2510

operates at 14bit accuracy, thus the least 2 bits are output as fixed value.

2-2-a Signals

- Frame Sync signal (FS)

8kHz reference signal which is same as in u/A-law PCM data mode. The FS pulse H level width should be 1 clock

period as same as in the short frame PCM mode.

- Bit Clock (BCLK)

BCLK defines the PCM data rate. BCLK can be varied from 512kHz or 2.048MHz which is different from in the

u/A-law PCM data mode.

- PCM data output (TOUT, ROUT)

TOUT and ROUT are output signal of 128Kbps linear PCM data. The data is synchronized to the BCLK which

determines the data rate. In the period in which the PCM data is not occupied, the TOUT and ROUT pins turns to

Hi-impedance output.

- PCM data input (TIN, RIN)

TIN and RIN are input signal of 128Kbps linear PCM data. The data is clocked by the falling edge of the BCLK

and fed into the PCM interface block.

16bti Linear Frame format

125us (8KHz)

FS

BCLK

MSB First

DX

Hi-Z

15 14 13 2 1 0

Hi-Z

MSB First

DR

*

15 14 13 2 1 0 * *

*

Hi-Z

15

*

14

2-3 AK130 B1/B2 Mode

These modes are for connecting the PCM interface to AK130, AKM’s TCM( ping-pong ) transceiver for PBX/KTS

system. The PCM data format is A-law or u-law which can be selected by the register. The AK130 B1 mode

interfaces the data to B1 channel, one of the B channel which AK130 provides, and t he AK130 B2 mode interfaces

the data to B2 channel.

2-3-a Signals

- Frame Sync signal (FS)

___

Please feed the FS signal which is generated by the AK130.( F0o , pin#3 )

- Bit Clock (BCLK)

BCLK defines the PCM data rate. Please use 2.048MHz clock which is generated by the AK130.( E2o,pin#5 )

- PCM data output (TOUT, ROUT)

TOUT and ROUT are output signal of 64Kbps PCM data. Please connect the ROUT to the PCM data input pin of

AK130. ( DSTi,pin#11 )

- PCM data input (TIN, RIN)

TIN and RIN are input signal of 64Kbps PCM data. The data is clocked by the falling edge of the BCLK and fed

into the PCM interface block. Please connect the RIN to the PCM data output pin of AK130. ( DSTo,pin#6 )

AKM

- 10 -

AK2510-E-00

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