st20-gp6 STMicroelectronics, st20-gp6 Datasheet - Page 2

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

Contents
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5
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ST20-GP6 architecture overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital signal processing module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1
Central processing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1
4.2
4.3
4.4
4.5
4.6
Interrupt controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1
5.2
5.3
5.4
5.5
5.6
Interrupt level controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1
6.2
Instruction set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1
7.2
7.3
Memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.1
8.2
8.3
Memory subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.1
9.2
DSP module registers ........................................................................................................................... 13
Registers ............................................................................................................................................... 19
Processes and concurrency ................................................................................................................. 20
Priority ................................................................................................................................................... 22
Process communications ...................................................................................................................... 23
Timers ................................................................................................................................................... 23
Traps and exceptions ........................................................................................................................... 24
Interrupt vector table ............................................................................................................................. 31
Interrupt handlers .................................................................................................................................. 31
Interrupt latency .................................................................................................................................... 32
Preemption and interrupt priority .......................................................................................................... 32
Restrictions on interrupt handlers ......................................................................................................... 33
Interrupt configuration registers ............................................................................................................ 33
Interrupt assignments ........................................................................................................................... 37
Interrupt level controller registers ......................................................................................................... 37
Instruction cycles .................................................................................................................................. 40
Instruction characteristics ..................................................................................................................... 41
Instruction set tables ............................................................................................................................. 42
System memory use ............................................................................................................................. 51
Boot ROM ............................................................................................................................................. 52
Internal peripheral space ...................................................................................................................... 52
SRAM ................................................................................................................................................... 55
ROM ..................................................................................................................................................... 55
ST20-GP6
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19
30
37
40
51
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7