st20-gp1 STMicroelectronics, st20-gp1 Datasheet - Page 6

• Manufacturer Part Number: st20-gp1
• Description: Gps Processor
• Manufacturer: STMicroelectronics

ST20-GP1
CPU supports the sharing of CPU time between applications without an operating system or
executive overhead.
The architecture is based on the ST20 CPU core and supporting macrocells developed by SGS-
THOMSON Microelectronics. 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-GP1 uses the ST20 macrocell library to provide the hardware modules required in a
GPS system. These include:
The ST20-GP1 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
6 bits of parallel I/O
Interrupt controller
Real time clock/calendar
Watchdog timer