AFE4110 datasheet(16/68 Pages) TI

16 / 68 page

AFE4110

SLLSE48

– JANUARY 2012

www.ti.com

INSTRUCTION SET

SHORT-FORM DESCRIPTION

The instruction set consists of the original 51

CPU

instructions with three formats and seven address

modes and additional instructions for the expanded

The AFE4110 is based on an MSP430 CPU core with

address range. Each instruction can operate on word

a 16-bit RISC architecture that is highly transparent to

and byte data. Table 1 shows examples of the three

the

application.

All

operations,

other

than

types of instruction formats; the address modes are

program-flow instructions, are performed as register

listed in Table 2.

operations in conjunction with seven addressing

modes for source operand and four addressing

modes for destination operand.

The CPU is integrated with 16 registers that provide

reduced

instruction

execution

time.

The

cycle of the CPU clock.

Four of the registers, R0 to R3, are dedicated as

program counter, stack pointer, status register, and

constant

generator

respectively.

The

remaining

registers are general-purpose registers.

Peripherals are connected to the CPU using data,

address, and control buses, and can be handled with

all instructions.

Table 1. Instruction Word Formats

Dual operands, source-destination

e.g. ADD

R4, R5

R4 + R5

→ R5

Single operands, destination only

e.g. CALL

→ (TOS), R8 → PC

Relative jump, un/conditional

Jump-on-equal bit = 0

Table 2. Address Mode Descriptions

ADDRESS MODE

S(1)

D(2)

SYNTAX

EXAMPLE

OPERATION

●

MOV Rs,Rd

MOV R10, R11

R10

→ R11

Indexed

●

MOV X(Rn), Y(Rm)

MOV 2(R5), 6(R6)

M(2+R5)

→ M(6+R6)

Symbolic (PC relative)

●

MOV EDE, TONI

M(EDE)

→ M(TONI)

Absolute

●

MOV

& MEM, and TCDAT

M(MEM)

→ M(TCDAT)

Indirect

●

MOV at Rn, Y(Rm)

MOV at R10,Tab(R6)

M(R10)

→ M(Tab+R6)

M(R10)

→ R11

Indirect autoincrement

●

MOV at Rn+,Rm

MOV at R10+, R11

R10 + 2

→ R10

Immediate

●

MOV at 45,TONI

MOV #45, TONI

#45

→ M(TONI)

(1)

S = source

(2)

D = destination

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