Features: • 0.25µ CMOS process technology
• ARM7 TDMI core
• Skyworks DSP core with all memory on-chip
• GPRS class 10 and circuit-switched data (14.4 kbps) services
• Half-rate, full-rate, and enhanced full-rate speech coders
• Voice features such as voice recognition, conversation record, and voice memo
• Hardware accelerator for GPRS encryption algorithms (GEA 1 and 2)
• Integrated Real-Time Clock (RTC)
• Interface to handset MMI peripherals such as keypad, liquid
crystal display (LCD), and annunciator
• Interfaces to Skyworks IA and PMIC devices
• Interface to Subscriber Identity Module (SIM)
• Addresses up to 16 MB of external memory (flash or SRAM)
• Application Interfaces:
- Serial/RS-232
- Infra-red Data Adapter (IrDA)
• Low power operation. 3 V I/Os and an on-chip supplied 2.5 V core
• Eight Chip Select (CS) signals for external memory
• 16-bit data bus, 24-bit address busApplication• GSM handsets and modules (850/900/1800/1900 MHz)
• GPRS handsets and modules (850/900/1800/1900 MHz)
• Bluetooth®-enabled wireless headset modulesDescriptionThe Skyworks CX805-30 Baseband Processors (BPs) are highly integrated, dual core processors optimized for use in Global System for Mobile communications (GSM) and General Packet Radio Service (GPRS) cellular handset applications. The CX805-30 is the baseband portion of the Skyworks GSM/GPRS System Solution. Both the Digital Signal Processor (DSP) core and the ARM7 THUMB™ Reduced Instruction Set Computing (RISC) architecture are well suited to meet the needs of low power, high performance embedded systems such as cellular phones.
The BP operates over a range of 2.7 V to 3.3 V. The baseband processing tasks are divided between the DSP and ARM7 processor cores. The DSP core executes the physical layer (layer 1) processing functions, and CX805-30 ARM microcontroller core executes the Layer 2 and Layer 3 protocol software and Man- Machine Interface (MMI) functions.
The two cores communicate through a dedicated block of dual port memory. Each of the functional blocks in CX805-30 can be individually powered down to ensure minimum current consumption in the idle or standby mode.
The CX805-30 family of devices is available in several package options:
• 12 x 12 mm, 0.8 mm pitch, 160-pin FPBGA
- CX80501-31: supports up to Class 8 GPRS operation
- CX80502-33/-35: supports up to Class 10 GPRS operation
• 10 x 10 mm, 0.5 mm pitch, 180-pin FPBGA
- CX80501-32: supports up to Class 8 GPRS operation
- CX80502-34/-36: supports up to Class 10 GPRS operation
- CX80503-34: supports up to Class 10 GPRS operation and features optimized ROM code
• Lead-free 10 x 10 mm, 0.5 mm pitch, 180-pin FPBGA
- CX80502-38: supports up to Class 10 GPRS operation
- CX80503-38: supports up to Class 10 GPRS operation and features optimized ROM code
CX805-30 Data Sheet
