ST72325S6B5(2007) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST72325S6B5
(Rev.:2007)
(Rev.:2007)
STMicroelectronics
ST72325S6B5 Datasheet PDF : 196 Pages
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INSTRUCTION SET OVERVIEW (Cont’d)
11.1.6 Indirect Indexed (Short, Long)
This is a combination of indirect and short indexed
addressing modes. The operand is referenced by
its memory address, which is defined by the un-
signed addition of an index register value (X or Y)
with a pointer value located in memory. The point-
er address follows the opcode.
The indirect indexed addressing mode consists of
two submodes:
Indirect Indexed (Short)
The pointer address is a byte, the pointer size is a
byte, thus allowing 00 - 1FE addressing space,
and requires 1 byte after the opcode.
Indirect Indexed (Long)
The pointer address is a byte, the pointer size is a
word, thus allowing 64 Kbyte addressing space,
and requires 1 byte after the opcode.
Table 28. Instructions Supporting Direct,
Indexed, Indirect and Indirect Indexed
Addressing Modes
Long and Short
Instructions
LD
CP
AND, OR, XOR
ADC, ADD, SUB, SBC
BCP
Function
Load
Compare
Logical Operations
Arithmetic Additions/Sub-
stractions operations
Bit Compare
11.1.7 Relative mode (Direct, Indirect)
This addressing mode is used to modify the PC
register value, by adding an 8-bit signed offset to
it.
Available Relative
Direct/Indirect
Instructions
JRxx
CALLR
Function
Conditional Jump
Call Relative
The relative addressing mode consists of two sub-
modes:
Relative (Direct)
The offset is following the opcode.
Relative (Indirect)
The offset is defined in memory, which address
follows the opcode.
Short Instructions Only
CLR
INC, DEC
TNZ
CPL, NEG
BSET, BRES
BTJT, BTJF
SLL, SRL, SRA, RLC,
RRC
SWAP
CALL, JP
Function
Clear
Increment/Decrement
Test Negative or Zero
1 or 2 Complement
Bit Operations
Bit Test and Jump Opera-
tions
Shift and Rotate Operations
Swap Nibbles
Call or Jump subroutine
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