st20-gp6 STMicroelectronics, st20-gp6 Datasheet - Page 6

• Manufacturer Part Number: st20-gp6
• Description: Gps Processor
• Manufacturer: STMicroelectronics

ST20-GP6
The ST20-GP6 can implement the GPS digital signal processing algorithms using less than 50% of
the available CPU processing power. This leaves the rest available for integrating OEM application
functions such as route-finding, map display and telemetry. A hardware microkernel in the ST20
CPU supports the sharing of CPU time between tasks without an operating system or executive
overhead.
The architecture is based on the ST20 CPU core and supporting macrocells developed by
STMicroelectronics. The ST20 micro-core family provides the tools and building blocks to enable
the development of highly integrated application specific 32-bit devices at the lowest cost and
fastest time to market. The ST20 macrocell library includes the ST20Cx family of 32-bit VL-RISC
(variable length reduced instruction set computer) micro-cores, embedded memories, standard
peripherals, I/O, controllers and ASICs.
The ST20-GP6 uses the ST20 macrocell library to provide the hardware modules required in a
GPS system. These include:
The ST20-GP6 is supported by a range of software and hardware development tools for PC and
UNIX hosts including an ANSI-C ST20 software toolset and the ST20 INQUEST window based
debugging toolkit.
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DSP hardware
Dual channel UART for serial communications
Two parallel I/O modules providing 16 bits of parallel I/O
Interrupt controller
Real time clock/calendar and watchdog timer
128 Kbytes of on-chip ROM for application code
64 Kbytes of on-chip RAM, of which 16 Kbytes is battery backed
Diagnostic control unit and test access port for development support