(No.RA003<Rev.004>)1-9
2.1.7 Power Supply
There are five 5V power supplies and five 3.3V power supplies: 50M, 50V, 50C, 50R, 50T, 33M, 33MS, 33B, 33R and 33MD.
50M and 33M are always output while the power is on.
33MS is always output, but turns off when the power is turned off, to prevent a malfunction of the MCU.
50C is a common 5V and is output when SAVE is not set to ON.
50R is 5V for reception and is output during reception.
50T is 5V for transmission and is output during transmission.
50V is 5V for the SP/MIC connector.
33B is 3.3V for the baseband IC (IC705).
3R is 3.3V for the IF IC (IC400) and is sent when SAVE is not set to ON.
33MD is 3.3V for the MCU digital supply.
Fig.9 Power supply
2.1.8 NXDN Receiving
2.1.8.1
For Digital Data Mode
The demodulated signal from IC400 (Pin13) is fed into the baseband IC (Pin 16) for NXDN decoding. The decoded digital data will
pass to the MCU through the C-BUS. The MCU determines whether or not to output sound from the speaker by checking if the data
matches.
IC601
AVR
IC703
AVR
IC603
AVR
Q601
50T SW
Q602
50R SW
IC710
MCU
IC600
DET
IC605
DET
+B
SB
BATT
33M
50R
33MD
Q606
33MS SW
33MS
50T
50M
IC606
AVR
33R
33B
50V
F601
1A
F600
2.5A
SB
BATT
GND
D600
IC602
AVR
50C
IC604
AVR
VDDA
INT
50RC
50TC
5CC
33MSC
VDD1-VDD6
RESET
IC715
AVR
Содержание NEXEDGE NX-340
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