6881094C31-E November 16, 2006
Theory of Operation: VOCON Board 3-17
Figure 3-8. VOCON Board Interconnections (only for NNTN5567)
The functional blocks consist of the following:
• Controller and Memory: The Patriot (U401), the dual-core processor with the microcontroller
unit (MCU) and a digital signal processor (DSP), the SRAM (U403) and Flash (U402) memory
devices.
• Audio and Power: The GCAP II (U501), a 5 Vdc linear regulator (U505), a 1.55 Vdc linear
regulator (NNTN4717 VOCON kit only), the audio pre-amplifier (U502), the audio power
amplifier (U503), and the dual EEPOT (U509).
NOTE: In kit NNTN5567 (Figure 3-8): the audio, power, and digital support are all embedded into
the MAKO IC (U501).
• Interface Support: The digital-support IC Flipper (U301), ESD protection circuitry, and side
connector interface circuitry.
NOTE: Refer to Table 8-2, “List of VOCON Schematics and Board Overlays,” on page 8-1 for a listing
of VOCON schematics that will aid in the following discussion.
3.2.1.1 Universal Connector J101
This is a 40-pin connector that mates with the universal flex on the housing. A majority of the lines on
the connector are for user interface: emergency and side buttons (pin 14), monitor button (pin 17),
secure/clear switch (pin 23), frequency switch (pins 24, 25, 26, and 27), volume knob (pin 31), and
the three-position switch (pin 34). The LEDs on the universal flex are controlled through pins 20, 21,
and 22. Connections to the external accessory connector, which include serial communication data
lines, external audio, and option select lines for controlling audio modes, are present at pins 1
through 13. Switched battery voltage (B+SENSE) is provided on pin 32. Most of the pins at this
connector have ESD protection devices and components.
SRAM
1MByte
INTERFACE SUPPORT
ESD Protection and
Side Connector
Circuitry
ASIC
Clocks and Side
Connector Support
VOCON
Board
CONTROLLER AND MEMORY
FLASH
8MBytes
Dual-Core
Processor
MCU and DSP
Keypad
22 pins
Display
22 pins
Encryption
40 pins
AUDIO AND POWER
RF
26 pins
Universal
40 pins
MAKO IC
Voltage Regulators
Audio Pre-amp
Power Amp
Clocks and
Digital Support
To Next Page
Loading...
