Sony Ericsson CM-42, Руководство интегратора

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CM-42 Technical Description PAGE 14 OF 38
SEM/CX-02:0076/DES A
2.3.3.1 Power Consumption
5.0 V ±10% 13.8 V ±20% Operational Mode Currents
(All measurements are in mA unless
otherwise noted)
Average Transient Peak Average Transient Peak
Voice Channel PL0
550 650 700 1000
Voice Channel PL2
850 920 4.5 -
AMPS
Standby (waiting for page)
45 - 4 uA -
Traffic Channel (800/1900MHz)
700/850 1000 4.5 -
CDMA
Standby (waiting for page)
4.0 - 4 uA -
Table 5: Power Consumption
2.3.3.1.1 Power Down Mode (Minimum DC Power consumption)
A power down mode is available in which the module is placed in a low power consumption state under control of
the host application. In this mode, the unit consumes approximately 110 uA of current as measured from the
VCC_5V supply input and 4 uA of current as measured from the VCC_12V supply input. To activate this mode, the
Module_PWR_EN_B signal on pin 12 of the system connector pulled to a logic level 1, which puts the module into
the low power state. The module will stay in the low power state until the Module_PWR_EN_B signal is driven low
by an external open collector transistor in the application circuitry. Turning the external open collector transistor off
will cause the Module_PWR_EN_B signal to float high and turn the module off. The Module_PWR_EN_B line is
tied to VCC_5V through a 220k
Ω
pull-up resistor so the sink current in the external open collector transistor is
minimal.
2.3.3.2 Power Supply And Ground Signals
Two separate voltages are required to power the module and are detailed below.
VCC_12: 13.8 V
±
20%. 1.3 A max. Ripple: 0-4KHz @ 600mVpp, 4KHz-10MHz @ 240mVpp
VCC_5: 5 volt
±
10%. 1.0 A max. Ripple: 0-4KHz @ 100mVpp, 4KHz-10MHz @ 50mVpp
Following is a list of the power supply pins:
Pin CM-42 Signal Description
29 VCC_12
13.8 volt
±
20%, 0.5A max
31
VCC_12
13.8 volt
±
20%, 0.5A max
32 VCC_12
13.8 volt
±
20%, 0.5A max
33 VCC_5
5 volt
±
10% regulated, 0.5A max
34 VCC_5
5 volt
±
10% regulated, 0.5A max
Table 6: CM-42 Power Supply Signals
The ground signals in the CM-42 are Analog Ground, AGND, connected to pin number 9, and Digital Ground, GND ,
connected to the system connector interface through pin numbers 5, 6, 8, 21 and 22.