Samsung S3F80JB manual SRP/SRP0/SRP1 Set Register Pointer, Srp

Models: S3F80JB

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INSTRUCTION SETS3F80JB

SRP/SRP0/SRP1 — Set Register Pointer

SRP

src

 

 

 

 

 

 

 

SRP0

src

 

 

 

 

 

 

 

SRP1

src

 

 

 

 

 

 

 

Operation:

If src (1)

=

1 and src (0)

=

0 then:

RP0 (3–7)

src (3–7)

 

If src (1)

=

0 and src (0)

=

1 then:

RP1 (3–7)

src (3–7)

 

If src (1)

=

0 and src (0)

=

0 then:

RP0 (4–7)

src (4–7),

 

 

 

 

 

 

RP0 (3)

0

 

 

 

 

 

 

RP1 (4–7)

src (4–7),

 

 

 

 

 

 

RP1 (3)

1

The source data bits one and zero (LSB) determine whether to write one or both of the register pointers, RP0 and RP1. Bits 3–7 of the selected register pointer are written unless both register pointers are selected. RP0.3 is then cleared to logic zero and RP1.3 is set to logic one.

Flags: No flags are affected.

Format:

opc

src

 

 

Examples: The statement

SRP #40H

Bytes

Cycles

Opcode

Addr Mode

 

 

(Hex)

src

2

4

31

IM

sets register pointer 0 (RP0) at location 0D6H to 40H and register pointer 1 (RP1) at location 0D7H to 48H.

The statement "SRP0 #50H" sets RP0 to 50H, and the statement "SRP1 #68H" sets RP1 to 68H.

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Page 208
Image 208
Samsung S3F80JB manual SRP/SRP0/SRP1 Set Register Pointer, Srp