Nokia 1508 Manual page 6

1508(RM-388)
Baseband Description and Troubleshooting
ARM7TDMI® Control Processor (CP) supports the protocol stack,
user interface, and hardware interface processing. Two TeakLite®
Digital Signal Processors (DSPs): one DSP supports CDMA modem
processing, the second DSP supports CDMA voice processing
The main features of the CBP 5.6
Supports CDMA2000® 1X (Release 0)
Backward compatible to IS-95 standards
Supports IS-2000 Quick Paging Channel for improved standby time
Support for multiple CDMA band classes (Band Class 0/US-Cellular, Band Class
1/US-PCS, Band Class 3/JTACS, Band Class 4/Korean-PCS); support for
additional band classes which can be added upon customer request
Special purpose logic provides signal processing, modulation, demodulation,
hardware accelerators and interfaces for keypad and display
Mixed signal circuitry for the Rx analog-to-digital converter (ADC), Rx filter, Tx
digital-to-analog converter (DAC), Tx filter, internal PLLs, voice codec, auxiliary
ADCs, auxiliary DACs, RF control and 32.768 kHz oscillator
Support for forward and reverse link data rates of up to 153.6 kbps (CBP5.6
only).
 D ual supply voltage (1.8 V digital core, 3.0 V analog and 3.0 V digital I/O)
3.0 V or 1.8 V external memory interface
USB support (12 Mbps)
Removable User Identity Module (R-UIM) compliant with IS-820
32-voice polyphonic ringer
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