Motorola SSETM 5000 - Manual (Page 28)

November 11, 2004 6881094C12-A
2-6 Theory of Operation: Power Distribution
Table 2-4 lists the supply voltages and the circuits that use these voltages.
Table 2-4. VOCON Board DC Power Distribution
Supply
Name
Output
Voltage
Supply Type
Unprogrammed
Output Voltage
Circuits Supplied
UNSW_B+ 9 to 6 Vdc
7.5 Vdc
nominal Battery N/A VCC5 input
Mechanical switch
Power switch (FET)
Secure module
SW_B+ 9 to 6 Vdc
7.5 Vdc
nominal Battery N/A VSW1 input (GCAP)
Audio power amplifier
Side connector
SW_B+ to transceiver board
GCAP IC
Secure module
USB circuitry
VCC5 5Vdc Linear regula-
tor N/A Smart battery circuitry
Int. / ext. microphone bias
Audio preamplifier
Digital-support IC
Display LEDs
VSW1 3.8 Vdc Switching
regulator
software pro-
grammable 3.2 Vdc 3-V regulators (RF)
VSW2 input
V2 input
1.55 V regulator bias
VSW2 1.8 Vdc Switching
regulator
software pro-
grammable 2.2 Vdc Dual-core processor’s external
memory interface
FLASH IC
SRAM
1.55 V regulator bias
VSW_1.55 1.55 Vdc Linear regula-
tor N/A Dual-core processor core
V2 2.893 Vdc Switching
regulator
software pro-
grammable 2.775 Vdc Dual-core processor’s I/O ring
Digital-support IC
EEPOT
Display
16.8 MHz buffer