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• Receive I and Q inputs
• Audio outputs for hands free operation
• Audio output to earpiece
• Audio inputs from microphone
• Audio inputs for hands free operation
• Tone Generation
• GMSK modulation, transmit frequency correction
• Digital to analogue conversion of the transmit I and Q signals
• A/D and D/A conversion / gain control for audio inputs/outputs
•
Serial Interface to NELL
This is a direct serial I/O interface to the NELL device used to pass data
destined for the PCMCIA interface:
•
Parallel Host Interface (PHIF) to CPU in NELL
The DSP communicates with the CPU in NELL via a dedicated interface
called the (PHIF) Parallel Host Interface:
•
Receiver IF Gain Control
The DSP sets the receiver IF gain to IC300 via control signals:
I/O:
RQNO, RQPO, RINO and RIPO (#77-80)
O/P:
RXAF- and RXAF+ (#95-96)
O/P:
AOUTN and AOUTP (#93-94)
I/P:
MICOUT and MICIN (#4-5)
I/P:
TXAF- and TXAF+ (#98-99)
I/O:
ICK (#67), OCK (#70)
OLD (#71), ILD (#66), OBE (#63),
DSP RXD (#64) and DSP TXD (#65)
I/O:
PB0-PB7 (#32-40) = Data I/O lines to CPU
POBE (#47), OE (#43) and WE (#41) = Interface
control
O/P:
PGCSTR (#72) - Receiver gain control
SYGCCL (#74) - Receiver gain control clock
SYGCDT (#75) - Receiver gain control data
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