CC1110-RTR1 datasheet(41/203 Pages) TI

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CC1110

CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A

Page 41 of 202

Pointer is initialized to 0x07 after a reset and it

is incremented once to start from location

0x08, which is the first register (R0) of the

second register bank. Thus, in order to use

more than one register bank, the SP should be

initialized to a different location not used for

data storage.

SP (0x81) – Stack Pointer

Bit

Name

Reset

R/W

Description

7:0

SP[7:0]

0x07

R/W

Stack Pointer

12.6 Instruction Set Summary

The 8051 instruction set is summarized in

Table 27. All mnemonics copyrighted

Corporation 1980.

The following conventions are used in the

instruction set summary:

•

Rn – Register R7-R0 of the currently

selected register bank.

•

direct – 8-bit internal data location’s

address. This can be DATA area (0x00 –

0x7F) or SFR area (0x80 – 0xFF).

•

@Ri – 8-bit internal data location, DATA

area (0x00 – 0xFF) addressed indirectly

through register R1 or R0.

•

#data

–

8-bit

constant

included

instruction.

•

#data16 – 16-bit constant included in

instruction.

•

addr16 – 16-bit destination address. Used

by LCALL and LJMP. A valid branch can be

anywhere within the 32 KB CODE

program memory space.

•

addr11 – 11-bit destination address. Used

by ACALL and AJMP. The branch will be

within the same 2 KB page of program

memory as the first byte of the following

instruction.

•

rel – Signed (two’s complement) 8-bit

offset byte. Used by SJMP and all

conditional jumps. Range is –128 to +127

bytes relative to first byte of the following

instruction.

•

bit – direct addressed bit in DATA area or

SFR.

The instructions that affect CPU flag settings

located in PSW are listed in Table 28 on page

45. Note that operations on the PSW or bits in

PSW will also affect the flag settings.

Table 27. Instruction Set Summary

Mnemonic

Description

Hex

Opcode

Bytes

Cycles

Arithmetic operations

ADD A,Rn

Add register to accumulator

28-2F

ADD A,direct

Add direct byte to accumulator

ADD A,@Ri

Add indirect RAM to accumulator

26-27

ADD A,#data

Add immediate data to accumulator

ADDC A,Rn

Add register to accumulator with carry flag

38-3F

ADDC A,direct

Add direct byte to A with carry flag

ADDC A,@Ri

Add indirect RAM to A with carry flag

36-37

ADDC A,#data

Add immediate data to A with carry flag

SUBB A,Rn

Subtract register from A with borrow

98-9F

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