6881094C31-E
November 16, 2006
Radio Power:
DC Power Routing—VOCON Board
2-5
In the case of a secure radio model, SW B+ and UNSW B+ are also supplied to the encryption
module through connector J701.
Transistor Q501 is also under the control of the microcontroller unit (MCU) via Vref from U501. This
allows the MCU to follow an orderly power-down sequence when it senses that B+SENSE is off. This
sense is provided through MECH_SW_BAR (inverted B+SENSE, see Q508).
In NNTN5567, the
MCU detects that B+SENSE is off when MECH_SW (inverted B+SENSE) is asserted high. This is
communicated to the MCU by the MAKO IC (U501) through the serial peripheral interface (SPI)
The digital circuits in the VOCON board are powered from regulators located in the GCAP II IC
(U501), an external 5 Vdc regulator (VCC5, U505), and an external 1.55 Vdc regulator (VSW_1.55V,
on NNTN4717 VOCON kit only). The GCAP II IC provides three supplies: VSW1, VSW2, and V2.
These regulators are software programmable.
lists the supply voltages and the circuits that
use these voltages.
In NNTN5567, the digital circuits in the VOCON board are powered from the
regulators in the MAKO IC(U501). MAKO IC provides five supplies: VSW1, V_2.9, VCC5, V1.55, and
V1.875. VSW1 is controlled by the MAKO IC, but uses an external driver to source the current from
SW B+. V_2.9, V1.55 and V1.875 are software programmable.
Table 2-4. VOCON Board DC Power Distribution (for kits: NTN9564, NNTN4563, NNTN4819 & NNTN4717.)
Supply
Name
Output
Voltage
Supply Type
Unprogrammed
Output Voltage
Circuits Supplied
9 to 6 Vdc
7.5 Vdc
nominal
Battery
N/A
VCC5 input
Mechanical switch
Power switch (FET)
Secure module
Real-time clock battery
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
Regulator
N/A
Smart battery circuitry
Int. / ext. microphone bias
Audio preamplifier
Flipper IC
Keypad / Display LEDs
VSW1
3.8 Vdc
Switching
regulator
software
progammable
3.2 Vdc
3-V regulators (RF)
VSW2 input
V2 input
VSW2
1.8 Vdc
Switching
regulator
software
progammable
2.2 Vdc
Patriot core
FLASH IC
SRAM
Display (only on NTN9564
VOCON board)
Summary of Contents for ASTRO XTS-5000
Page 7: ...vi Table of Contents November 16 2006 6881094C31 E Notes ...
Page 11: ...x List of Figures November 16 2006 6881094C31 E Notes ...
Page 17: ...November 16 2006 6881094C31 E xvi CommercialWarranty Notes ...
Page 31: ...November 16 2006 6881094C31 E xxx Portable Radio Model Numbering System Notes ...
Page 83: ...November 16 2006 6881094C31 E 3 44 Theory of Operation Encryption Module ...
Page 135: ...November 16 2006 6881094C31 E 5 44 Troubleshooting Charts Secure Hardware Failure Notes ...
Page 175: ...November 16 2006 6881094C31 E 7 32 Troubleshooting Tables List of Board and IC Signals Notes ...
Page 367: ...November 16 2006 6881094C31 E Glossary 10 Notes ...
Page 373: ...Index 6 November 16 2006 6881094C31 E Notes ...