SX8801IRXXMLTRT View Datasheet(PDF) - Semtech Corporation

Part Name

Description

MFG CO.

SX8801IRXXMLTRT

Sensing Machine Data Acquisition with 16+10 bit ZoomingADC™

Semtech Corporation 

Prev 21 22 23 24 25 26 27 28 29 30 Next

XE8801A – SX8801R

Sflag

-,-,-, a

a[7] := C; a[6] := C xor V; a[5] := ST full; a[4] := ST empty

Rflag reg

Rflag eaddr

C, V, Z, a

C, V, Z, a

a := reg << 1; ; a[0] := 0; C := reg[7]

a := DM(eaddr)<<1; a[0] :=0; C := DM(eaddr)[7]

Freq divn

-,-,-, -

reduces the CPU frequency (divn=nodiv, div2, div4, div8, div16)

Halt

-,-,-, -

halts the CPU

Nop

-,-,-, -

no operation

- = unchanged, u = undefined, *MSHR reg,# 1 doesn’t shift by 1

Table 3-4. Instruction short reference

The Coolrisc816 has 8 different addressing modes. These modes are described in Table 3-5. In this table, the

notation ix refers to one of the data memory index registers i0, i1, i2 or i3. Using eaddr in an instruction of Table 3-4

will access the data memory at the address DM(eaddr) and will simultaneously execute the index operation.

extended address

eaddr

addr[7:0]

(ix)

(ix, offset[7:0])

(ix,r3)

(ix)+

(ix,offset[7:0])+

-(ix)

-(ix,offset[7:0])

accessed data memory

location

DM(eaddr)

DM(h00&addr[7:0])

DM(ix)

DM(ix+offset)

DM(ix+r3)

DM(ix)

DM(ix+offset)

DM(ix-1)

DM(ix-offset)

index

operation

-

-

-

-

ix := ix+1

ix := ix+offset

ix := ix-1

ix := ix -offset

direct addressing

indexed addressing

indexed addressing with immediate offset

indexed addressing with register offset

indexed addressing with index post-increment

indexed addressing with index post-increment by the offset

indexed addressing with index pre-decrement

indexed addressing with index pre-decrement by the offset

Table 3-5. Extended address mode description

Eleven different jump conditions are implemented as shown in Table 3-6. The contents of the column CC in this

table should replace the CC notation in the instruction description of Table 3-4.

CC

condition

CS

C=1

CC

C=0

ZS

Z=1

ZC

Z=0

VS

V=1

VC

V=0

EV

(EV1 or EV0)=1

After CMP op1,op2

EQ

op1=op2

NE

op1≠op2

GT

op1>op2

GE

op1≥op2

LT

op1<op2

LE

op1≤op2

Table 3-6. Jump condition description

© Semtech 2005

www.semtech.com

3-6

Share Link: