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CYWUSB6953 数据表(PDF) 15 Page - Cypress Semiconductor

部件名 CYWUSB6953
功能描述  Programmable Radio on Chip Low Power
PDF  68 Pages
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制造商  CYPRESS [Cypress Semiconductor]
网页  http://www.cypress.com
标志 CYPRESS - Cypress Semiconductor

CYWUSB6953 数据表(HTML) 15 Page - Cypress Semiconductor

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CYRF69103
Document #: 001-07611 Rev *F
Page 15 of 68
12. Addressing Modes
Examples of the different addressing modes are discussed in
this section and example code is given.
12.1 Source Immediate
The result of an instruction using this addressing mode is placed
in the A register, the F register, the SP register, or the X register,
which is specified as part of the instruction opcode. Operand 1
is an immediate value that serves as a source for the instruction.
Arithmetic instructions require two sources. Instructions using
this addressing mode are two bytes in length.
Examples
12.2 Source Direct
The result of an instruction using this addressing mode is placed
in either the A register or the X register, which is specified as part
of the instruction opcode. Operand 1 is an address that points to
a location in either the RAM memory space or the register space
that is the source for the instruction. Arithmetic instructions
require two sources; the second source is the A register or X
register specified in the opcode. Instructions using this
addressing mode are two bytes in length.
Examples
12.3 Source Indexed
The result of an instruction using this addressing mode is placed
in either the A register or the X register, which is specified as part
of the instruction opcode. Operand 1 is added to the X register
forming an address that points to a location in either the RAM
memory space or the register space that is the source for the
instruction. Arithmetic instructions require two sources; the
second source is the A register or X register specified in the
opcode. Instructions using this addressing mode are two bytes
in length.
Examples
12.4 Destination Direct
The result of an instruction using this addressing mode is placed
within either the RAM memory space or the register space.
Operand 1 is an address that points to the location of the result.
The source for the instruction is either the A register or the X
register, which is specified as part of the instruction opcode.
Arithmetic instructions require two sources; the second source is
the location specified by Operand 1. Instructions using this
addressing mode are two bytes in length.
Examples
Table 12-1. Source Immediate
Opcode
Operand 1
Instruction
Immediate Value
ADD
A,
7 In this case, the immediate value of 7 is
added with the Accumulator, and the result
is placed in the Accumulator.
MOV
X,
8 In this case, the immediate value of 8 is
moved to the X register.
AND
F,
9 In this case, the immediate value of 9 is
logically ANDed with the F register and the
result is placed in the F register.
Table 12-2. Source Direct
Opcode
Operand 1
Instruction
Source Address
ADD
A,
[7]
In this case, the value in the RAM
memory location at address 7 is
added with the Accumulator, and the
result is placed in the Accumulator.
MOV
X,
REG[8] In this case, the value in the register
space at address 8 is moved to the X
register.
Table 12-3. Source Indexed
Opcode
Operand 1
Instruction
Source Index
ADD
A,
[X+7]
In this case, the value in the
memory location at address X + 7
is added with the Accumulator,
and the result is placed in the
Accumulator.
MOV
X,
REG[X+8] In this case, the value in the
register space at address X + 8 is
moved to the X register.
Table 12-4. Destination Direct
Opcode
Operand 1
Instruction
Destination Address
ADD
[7],
A
In this case, the value in the
memory location at address 7 is
added with the Accumulator, and
the result is placed in the memory
location at address 7. The
Accumulator is unchanged.
MOV
REG[8],
A
In this case, the Accumulator is
moved to the register space
location at address 8. The
Accumulator is unchanged.
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