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TDMA T2290/T2297:
Description
The DCI (U1800) is data converter interface between the DSP and the RF functions of a dual band TDMA transceiver. It incorpo-
rates the following functions:
•
Dual channel forward data I and Q(RX_I & RX_Q)
•
Two DACs for reverse data I and Q(TX_I & tx_Q)
•
DAC for AFC
•
DAC for AGC & DAC for reverse PA control
•
DAC for PA bias
•
Serial Synchronous Interface(SSI)
•
Serial Peripheral Interface(SPI)
•
Internally generates clocks from single master input
•
Analog wide band forward data signalling functio ns with SPI inte rface
•
Analog modulator interface
•
Analog discrim inator interfaces
•
RF Discontinuous Receive du ring Manchester decoding
•
On chip voltage reference for transmit I and Q
DCI (U1800)
BLOCK DIAGRAM NOT NECESSARY
REFER TO PAGE B23
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