CC1010-RTY1 datasheet(24/150 Pages) TI2

24 / 150 page

CC1010

SWRS047A

Page 24 of 146

SP (0x81) - Stack Pointer

Bit

Name

R/W

Reset value

Description

7:0

SP(7:0)

R/W

0x07

Stack Pointer, used for pushing and poping data

to and from the stack. Note that the reset value

for SP is 0x07

15.5 Instruction Set Summary

The 8051 instruction set is summarised in

Table

below.

All

mnemonics

are

One non-standard 8051 instruction, TRAP,

with opcode 0xA5 is included to enable

setting of breakpoints. This instruction is

described in the In Circuit Debugging

section at page 44. Symbols used in the

table are:

•

- Accumulator

•

- Register pair A and B

•

- Multiplication register

•

- Carry flag

•

DPTR

- Data pointer

•

- Register R0 - R7

•

- Program counter

•

direct

- 8-bit data address (Internal

RAM 0x00 - 0x7F, SFRs 0x80-0xFF)

•

@Ri

- Internal register pointed to by R0

or R1 (except MOVX)

•

rel

- Two's complement offset byte

used by SJMP and conditional jumps

•

bit

- Direct bit address

•

#data

- 8-bit constant

•

#data 16

- 16-bit constant

•

addr 16

- 16-bit destination address

•

addr 11

- 11-bit destination address,

used by ACALL and AJMP. The branch

will be within the same 2 kB block of

program memory of the first byte of

the following instruction.

The ‘Bytes’ column shows the number of

bytes of Flash memory used. Further, the

number of instruction cycles is shown.

Each instruction cycle requires four clock

cycles. The 4 rightmost columns shows

which flags in the program status word

PSW

(see page 23) are affected by the

instructions.

Mnemonic

Description

Arithmetic

ADD A, Rn

Add register to A

28-2F

ADD A, direct

Add direct byte to A

ADD A, @Ri

Add data memory to A

26-27

ADD A, #data

Add immediate to A

ADDC A, Rn

Add register to A with carry

38-3F

ADDC A, direct

Add direct byte to A with carry

ADDC A, @Ri

Add data memory to A with carry

36-37

ADDC A, #data

Add immediate to A with carry

SUBB A, Rn

Subtract register from A with

borrow

98-9F

SUBB A, direct

Subtract direct byte from A with

borrow

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