MSM7584D Просмотр технического описания (PDF) - Oki Electric Industry

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MSM7584D

π/4 Shift QPSK MODEM/ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

FEDL7584D-02

MSM7584D

PDN0, PDN1, PDN2

Various power down controls.

PDN0 controls the standby mode/communication mode; PDN1 controls the modulator; PDN2

controls the demodulator. Refer to Table 1 for details.

Table 1 Description of Modem Power Down Control

Standby

Mode

Commu-

nication

Mode

PDN0 PDN2 PDN1

Operation State

0 0/1 0 Entire system is powered down. The control register is not reset.

0 0/1 1 Modulator unit is powered off. (VREF and PLL also powered off.)

Demodulator unit is powered on.

1

0

0 Modulator unit is powered off. (VREF and PLL are powered on.)

I and Q outputs are in a high impedance state.

Only the demodulator clock regenerator unit is powered on.

1

0

1 Modulator unit is powered off. (VREF and PLL are powered on.)

I and Q outputs are in a high impedance state.

Demodulator unit is powered on.

1

1

0 Modulator unit is powered on.

Only the demodulator clock regenerator unit is powered on.

1

1

1 Modulator unit is powered on.

Demodulator unit is powered on.

Mode Name

Mode A

Mode B

Mode C

Mode D

Mode E

Mode F

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