February 14, 2012 6816985H01-F
3.5-4 900 MHz Radio Power: B+ and +5V Routing for VOCON
Table 3.5-1 lists the supply voltages and the circuits that use these voltages.
Table 3.5-1. Power Supply Configuration for VOCON Section
Supply
Name
Output Voltage Supply Type
Unprogrammed
Output Voltage
Circuits Supplied
UNSW_B+ 6V – 9V
7.5V (nominal)
Battery N/A • Mechanical Switch
• Power Switch
• Secure Mode
SW_B+
RFSW_B+
6V – 9V
7.5 (nominal)
Battery N/A • VSW1Driver
• Audio Power Amplifier
• DC Power Supply to RF
section
• MAKO IC
• Secure Module
VCC5 5V Switching regulator
software
programmable
N/A • Smart battery circuitry
• Int./Ext. MIC Bias
• Display LEDs
VSW1 3.6V Switching regulator
Software
programmable
N/A • 3V regulators (RF)
• MAKO VSW2 Input
V1.875 1.875V dc Switching regulator
Software
programmable
1.75V dc • Dual-core processor’s
external memory
interface
• FLASH IC
• SRAM
V1.55 1.55V dc Switching regulator
Software
programmable
1.55V dc • Dual-core processor
core
V2.9 2.9V dc Switching regulator
Software
programmable
2.775V dc • Dual-core processor’s
I/O ring
• Digital support circuitry
• Display
• 16.8MHz buffer
• 32.768kHz buffer
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