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3.6 Analog Main Processor (AD6521, U101)
(1) Block Diagram
MCLK
MCLKEN
RESET
BSDI
BSIFS
TXCN
ATSM
RXON
ARSM
BSDO
BSOFS
ASDI
ASDO
ASFS
VSDI
VSDO
VSFS
TDI TDO TNS TCK
JTAG INTERFACE
GMSK
MOD
32X10 BIT
RAMP RAM
BASEBAND
SERIAL
BASEBAND TRANSMIT SECTION
PORT
AUXLIARY
CONTROL
SERIAL
REGISTERS
PORT
ALTER
VOICEBAND
SERIAL
PORT
ALTER
Figure 3-10. Functional Block Diagram of AD6521
- 23 -
AVDD DVDD AGND DGND
I TRANSMIT
ALTER
DAC
Q TRANSMIT
ALTER
DAC
10-BIT
ALTER
RAMP DAC
I RECEIVE
AL TER
ACC
Q RECEIVE
AL TER
ACC
BASEBAND RECEIVE SECTION
13-BIT
AFC DAC
10-BIT
IDAC
10-BIT
ALLXADC
VOLTAGE
REFERENCE
AUXLIARY SECTION
DAC
ALTER
MC
ACC
PGA
VOICEBAND SELECTION
3. TECHNICAL BRIEF
ITXP
ITXN
QTXP
QTXN
RAMPDAC
RXP
RXN
QRXP
QRXN
AFCDAC
DACCUT
DACREF
AUXADC1
AUXADC2
AUXADC3
AUXADC4
AUXADC5
AUXADC6
REFOUT
REFCAP
VOUTNORP
VOUTNORN
VOUTAUXP
VOUTAUXN
BUZZER
VINNORP
VINNORN
VINAUXP
VINAUXN
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