Error! No text of specified style in document. - System Integration Manual
CDMA-2X-11004-P1
Objective Specification
System description
Page 18 of 79
Error! No text of specified style in document. modules must be supplied via the VCC pins. There is
only one main power supply input, available on the three
1
or five
2
VCC pins that must be all
connected to the external power supply
The VCC pins are directly connected to the RF power amplifiers and to the integrated Power
Management Unit (PMU) within the module: all supply voltages needed by the module are
generated from the VCC supply by integrated voltage regulators.
When a 1.8 V or a 3 V SIM card type is connected, Error! No text of specified style in document.
modules automatically supply the SIM card via the VSIM pin. Activation and deactivation of the
SIM interface with automatic voltage switch from 1.8 to 3 V is implemented, in accordance to the
ISO-IEC 7816-3 specifications.
The 2.8 voltage domain used internally also available on the V_INT pin, to allow more economical
and efficient integration of the Error! No text of specified style in document. modules in the final
application.
The integrated Power Management Unit also provides the control state machine for system start up
and system shut down control.
5.3.2
Module supply (VCC)
Error! No text of specified style in document. modules must be supplied through the VCC pins by a
DC power supply. Voltages must be stable: during operation, the current drawn from VCC can vary
by some orders of magnitude.
Name
Description
Remarks
VCC
Module power supply input
VCC pins are internally connected, but all the
available pads or pins must be connected to the
external supply in order to minimize the power loss due
to series resistance.
Clean and stable supply is required: low ripple and
low voltage drop must be guaranteed.
Voltage provided must always be above the
minimum limit of the operating range.
GND
Ground
GND pins are internally connected but a good (low
impedance) external ground can improve RF
performance: all available pads or pins must be
connected to ground.
Table 3: Module supply pins
Higher ESD protection level can be required if VCC is externally accessible on the
application board. Higher protection level can be achieved by mounting an ESD protection
(e.g. EPCOS CA05P4S14THSG varistor array) on the line connected to this pin.
The voltage provided to the VCC pins must be within the normal operating range limits as
specified in the LISA-C200 Data Sheet [1] or FW75-C200 Data Sheet [2]. Complete
functionality of the module is only guaranteed within the specified minimum and maximum
VCC voltage operating range.
Ensure that the input voltage at the VCC pins never drops below the minimum limit of the
operating range when the module is switched on.
Operation above the operating range maximum limit is not recommended and extended exposure
beyond it may affect device reliability.
1
LISA-C200.
2
FW75-C200.