Texas Instruments MSP50C6xx User Manual
Page 157
Legend
4-71
Assembly Language Instructions
Symbol
Meaning
A~
Select offset accumulator as the source if this bit is 1. Used in opcode encoding only.
~A
Select offset accumulator as the destination accumulator if this bit is 1. Used in opcode encod-
ing only.
A~
Select offset accumulator as the source if this bit is 0. Used in opcode encoding only.
~A~
Can be either ~A or A~ based on opcode (or instruction). Used in Opcode encoding only.
An[~]
Can be either An or An~ where n = 0...3
APn
Accumulator Pointer register where n = 0..3. Low-order 5 bits select one of 32 accumulators.
adrs
Addressing mode bits am, Rx, pm. See Table 4–46.
{adrs}n
Addressing mode which must be provided. It should be of the format shown in Table 4–46. The curly
braces { } are not included in the actual instruction. The subscript n represents the data size (in bits)
the instruction will use. For example, {adrs}
8
means that the instruction will use 8-bit data from the
addressed memory and the upper bits may not be used. If n is not provided, data width is 16 bits.
cc
Condition code bits used with conditional branch/calls and test flag/bit instructions.
{cc}
Conditional code mnemonic used with conditional branch/calls and test flag/bit instructions. Curly
braces indicates this field is not optional.
CF
Carry flag
clk
Total clock cycles per instruction
dma[n]
n bit data memory address. For example, dma8 means 8-bit location data memory address. If n is
not specified, defaults to dma16.
DP
Data pointer register, 16 bits
flagadrs
Flag addressing syntax as shown in Table 4–47.
flg
Test flag bit. Used in opcode encoding only.
{flagadrs}
Flag addressing syntax as shown in Table 4–48.
FM
Fractional mode
g/r
Global/relative flag bit for flag addressing.
IM
Interrupt enable mode
imm[n]
n bit immediate value. If n is not specified, defaults to imm16.
k0...kn
Constant field bits.
MR
Multiply register, 16 bits
next A
Accumulator pointer premodification. See Table 4–45.
Not
Not condition on conditional jumps, conditional calls or test flag instructions.
N/R
Not repeatable or not recommended