CMX608 datasheet(39/70 Pages) CMLMICRO

39 / 70 page

RALCWI Vocoder

CMX608/CMX618/CMX638

 2014 CML Microsystems Plc

D/608_18_38/11

IRQN will go low. The SVCACK register ($2E) will contain the status value, indicating whether the

write to this register was successful. No other C-BUS registers should be read from or written to

whilst this command is in progress. Writing reserved values will result in an error status being

returned in the SVCACK register.

SEL1 / SEL0 = '00' - Output ports

REC

EEC

This sub-register allows direct control of the two output ports, EEC and REC. Whilst these output

ports can be used as general output ports, REC is intended to control the RESET of an external

CODEC and EEC is intended to control an ENABLE, if one is available.

Bit 0

EEC (Enable External CODEC)

Setting this bit to '1' causes the EEC port to go high.

Clearing this bit to '0' causes the EEC port to go low.

Bit 1

REC (Reset External CODEC)

Setting this bit to '1' causes the REC port to go high.

Clearing this bit to '0' causes the REC port to go low.

Bits 5-2

Reserved

These bits should be cleared to '0' for correct device operation.

SEL1 / SEL0 = '01' - Select CODEC

CODEC

This sub-register controls the basic settings of the SSP (Synchronous Serial Port).

Bits 3-0

CODEC

This field specifies the type of external CODEC to be used. Bit 3 is the msb.

0 Reserved

1 CODEC_GENERIC1

This specifies a CODEC that samples its data on the positive edge of SCLK. The SSP's output

FIFO will not be primed.

2 CODEC_GENERIC2

This specifies a CODEC that samples its data on the positive edge of SCLK. The SSP's output

FIFO will be primed.

3 CODEC_GENERIC3

This specifies a CODEC that samples its data on the negative edge of SCLK. The SSP's output

FIFO will not be primed.

4 CODEC_GENERIC4

This specifies a CODEC that samples its data on the negative edge of SCLK. The SSP's output

FIFO will be primed.

5 CODEC_PCM3500 - Burr-Brown PCM3500

This specifies a setting suitable for the PCM3500.

CMX608 数据表(PDF) 39 Page - CML Microcircuits

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