st72324bk STMicroelectronics, st72324bk Datasheet - Page 108

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

Instruction set
10.1.2
10.1.3
10.1.4
10.1.5
108/167
Immediate
Immediate instructions have two bytes, the first byte contains the opcode, the second byte
contains the operand value.
Table 55.
Direct
In Direct instructions, the operands are referenced by their memory address. The direct
addressing mode consists of two submodes:
Direct (short)
The address is a byte, thus requires only one byte after the opcode, but only allows 00 - FF
addressing space.
Direct (long)
The address is a word, thus allowing 64 Kbyte addressing space, but requires 2 bytes after
the opcode.
Indexed (No Offset, Short, Long)
In this mode, the operand is referenced by its memory address, which is defined by the
unsigned addition of an index register (X or Y) with an offset. The indirect addressing mode
consists of three submodes:
Indexed (No Offset)
There is no offset, (no extra byte after the opcode), and allows 00 - FF addressing space.
Indexed (Short)
The offset is a byte, thus requires only one byte after the opcode and allows 00 - 1FE
addressing space.
Indexed (long)
The offset is a word, thus allowing 64 Kbyte addressing space and requires 2 bytes after the
opcode.
Indirect (Short, Long)
The required data byte to do the operation is found by its memory address, located in
memory (pointer).
LD
CP
BCP
AND, OR, XOR
ADC, ADD, SUB, SBC
Immediate instruction
Immediate instructions
Load
Compare
Bit compare
Logical operations
Arithmetic operations
Function
ST72323 ST72323L