ST20-GP1 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST20-GP1

GPS PROCESSOR

STMicroelectronics 

ST20-GP1

6.3 Instruction set tables

Function

code

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Memory

code

0X

1X

2X

3X

4X

5X

6X

7X

8X

9X

AX

BX

CX

DX

EX

FX

Mnemonic

Processor Name

cycles

j

7

jump

ldlp

1

load local pointer

pfix

0 to 3

prefix

ldnl

1

load non-local

ldc

1

load constant

ldnlp

nfix

1

0 to 3

load non-local pointer

negative prefix

ldl

1

load local

adc

2 to 3

add constant

call

8

call

cj

1 or 7

conditional jump

ajw

2

adjust workspace

eqc

1

equals constant

stl

1

store local

stnl

2

store non-local

opr

0

operate

Table 6.3 Primary functions

Memory Mnemonic

code

Processor Name

cycles

22FA testpranal

1

test processor analyzing

23FE saveh

3

save high priority queue registers

23FD savel

3

save low priority queue registers

21F8 sthf

1

store high priority front pointer

25F0 sthb

1

store high priority back pointer

21FC stlf

1

store low priority front pointer

21F7 stlb

1

store low priority back pointer

25F4 sttimer

2

store timer

2127FC lddevid

1

load device identity†

27FE ldmemstartval

†See Section 22

1

load value of MemStart address

Table 6.4 Processor initialization operation codes

Notes

D, T

O

Notes

36/116

®

Share Link: