¡ 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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