CMX608 datasheet(37/70 Pages) CMLMICRO

37 / 70 page

RALCWI Vocoder

CMX608/CMX618/CMX638

 2014 CML Microsystems Plc

D/608_18_38/11

Bit 4 to 7

These bits specify the duration of the DTMF signalling in terms of Vocoder

frames,

FRAME

which each have a length of 20ms.

COUNT

Bit 7

Bit 6

Bit 5

Bit 4

Frames

Symbol

OFF

20ms

40ms

60ms

80ms

100ms

120ms

140ms

160ms

180ms

200ms

220ms

240ms

260ms

280ms

Continuous

POWERSAVE register address $09

THROTTLE

ADCON

DACON

CODEC

BIAS

This write-only register controls the powersaving features of the device. All the bits in this register

are cleared to '0' after a power up reset. Before vocoding analogue signals, the BIAS and CODEC

functions must be turned on. If the device is being used only as a repeater with no monitoring,

then the CODEC and BIAS functions may be switched off.

Bit 0

Setting this bit to '1' will turn on the analogue bias. The host should wait for

BIAS

approximately 100ms to allow the bias capacitors to charge.

Clearing this bit to '0' will turn off the analogue bias.

Bit 1

Setting this bit to '1' will turn on the CODEC master clock and set it up for use with

CODEC

the vocoding function.

Clearing this bit to '0' will turn off the master clock of the CODEC.

Bit 2

Setting this bit to '1' will prevent the DAC from being power-saved when the

DACON

device is not decoding.

Clearing this bit to '0' will cause DAC to be power-saved whenever the device is

not decoding.

Bit 3

Setting this bit to '1' will prevent the ADC from being power-saved when the

ADCON

device is not encoding.

Clearing this bit to '0' will cause the ADC to be power-saved whenever the device

is not encoding.

CMX608 Note: Bits 0 to 3 have no effect in the CMX608 and should be cleared to '0'.

CMX608 数据表(PDF) 37 Page - CML Microcircuits

CMX608 数据表(HTML) 37 Page - CML Microcircuits

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