mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 645

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

14.8.1.3
Operands for immediate mode instructions are included in the instruction stream and are fetched into the
instruction queue along with the rest of the 16 bit instruction. The ’#’ symbol is used to indicate an
immediate addressing mode operand. This address mode is used for semaphore instructions.
Examples:
14.8.1.4
The 4 bit wide immediate addressing mode is supported by all shift instructions.
RD = RD ∗ IMM4
Examples:
14.8.1.5
The 8 bit wide immediate addressing mode is supported by four major commands (ADD, SUB, LD, CMP).
RD = RD ∗ imm8
Examples:
14.8.1.6
The 16 bit wide immediate addressing mode is a construct to simplify assembler code. Instructions which
offer this mode are translated into two opcodes using the eight bit wide immediate addressing mode.
RD = RD ∗ IMM16
Examples:
14.8.1.7
In this addressing mode only one operand is explicitly given. This operand can either be the source (f(RD)),
the target (RD = f()), or both source and target of the operation (RD = f(RD)).
Examples:
Freescale Semiconductor
CSEM
SSEM
LSL
LSR
ADDL
SUBL
LDH
CMPL
LDW
ADD
JAL
SIF
Immediate 3-Bit Wide (IMM3)
Immediate 4 Bit Wide (IMM4)
Immediate 8 Bit Wide (IMM8)
Immediate 16 Bit Wide (IMM16)
Monadic Addressing (MON)
#1
#3
R4,#1
R4,#3
R1,#1
R2,#2
R3,#3
R4,#4
R4,#$1234
R4,#$5678
R1
R2
; Unlock semaphore 1
; Lock Semaphore 3
; R4 = R4 << 1; shift register R4 by 1 bit to the left
; R4 = R4 >> 3; shift register R4 by 3 bits to the right
; adds an 8 bit value to register R1
; subtracts an 8 bit value from register R2
; loads an 8 bit immediate into the high byte of Register R3
; compares the low byte of register R4 with an immediate value
; PC = R1, R1 = PC+2
; Trigger IRQ associated with the channel number in R2.L
MC9S12XF - Family Reference Manual, Rev.1.19
; translated to LDL R4,#$34; LDH R4,#$12
; translated to ADDL R4,#$78; ADDH R4,#$56
Chapter 14 XGATE (S12XGATEV3)
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