(No.RA073<Rev.001>)1-23
Fig.4 Power supply circuit
2.4.8 Signaling Circuit
2.4.8.1
Encode (QT/DQT/ DTMF/ 2-tone/ MSK)
Each signaling data signal of QT, DQT, DTMF, 2-tone and MSK is generated by MPU/DSP (IC706), superposed on a modulation
signal and output to TX VCO and PLL IC.
2.4.8.2
Decode (QT/DQT/ DTMF/ 2-tone/ MSK)
The audio signal is removed from the FM detection signal is sent to the MPU/DSP (IC706) and the resulting signal is decoded by MPU/
DSP (IC706).
RF Power Module
MPU/DSP I/O(B), DDR
Mobile DDR2, Clock buffer
+B
54M
12M
33A
Power management IC
31BU
MPU/DSP RTC
12BU
18M
18M_3
Flash Memory V(I/O) & 3 state(512M)
CODEC DVDD
18M
33M
MPU/DSP I/O(A,C) DVDD,
USB_VDDA33
Flash Memory, I/O Expander, ADC,
CODEC
19.2M TCXO circuit, Uart SW, RS-232C
Power management IC
Interface unit
Module (BT/GPS) unit
8bit/8ch DAC
12bit/4ch DAC
CODEC AVDD,DRVDD
33A
18M
33OPT
Option Board
33M
50A
I/O Expander, D-sub level shift.
8bit/16ch ADC AVCC
OP Amp for VREF/25REF
MPU/DSP USB_VBUS
OP Amp for AF
SBC_2
50C
PLL IC, IF IC, 2nd VCO
SBC_2
PLL IC, IF IC
VCO Assist
Frontend Tuning
200C
VCO buffer Amp
RX Heter SW , Local Amp
LNA, 1st Mixer, IF Amp
50R
RXC
50BU
SCTAM1
Option Board
/TAM_CNT
Q8, Q9, D11
5V Reg
TX/RX VCO
Ripple
Filter
33SD
microSD
SD_EN
TX Hetero SW
Q81
DC SW
MPU/DSP Core
MPU/DSP PLL
F1
IC8
5.4V DC/DC
IC1
3.1V AVR
BAT_CNT
from
Power management IC
(IC2)
Q1, Q3
DC SW
IC24
1.2V DC/DC
IC11
1.8V DC/DC
IC5
3.3V AVR
IC4
3.3V AVR
IC14
3.3V AVR
IC7
3.3V AVR
IC10
5V AVR
33C
IC12
3.3V AVR
IC6
5V AVR
IC17
5V AVR
IC3
1.2V AVR
IC9
DC SW
IC13
20V DC/DC
54M
33M
CN2
SB1
D-sub 25
Interface unit
TX circuit
90C
50USB
SBC_2
90ANT
ANTSW
F3
SB2
TX Pre-drive(MMIC)
ASSW
50CT
Audio Power Amp
RF Detector / Controller
TXC
USB_ID2
USB_HOST_EN
90T
VBUS
Antenna switch
F2
Q5, Q6
DC SW
Q10, Q11
DC SW
IC15
9V AVR
IC1013
5.0V DC/DC
Q15, Q16
DC SW
USB_HOST_EN
IC1014,
IC1015
Q17, Q18
DC SW
IC16
5V AVR
Q14
DC SW
VCO Common Amp, Fin Amp
Fin filter switch
Содержание NX-5700HB
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