 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ST72561AR7-Auto Datasheet(PDF) 269 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
ST72561AR7-Auto Datasheet(HTML) 269 Page - STMicroelectronics |
|
|
269 / 324 page  ST72561-Auto Instruction set Doc ID 12370 Rev 8 269/324 19.2.1 Using a prebyte The instructions are described with one to four opcodes. In order to extend the number of available opcodes for an 8-bit CPU (256 opcodes), three different prebyte opcodes are defined. These prebytes modify the meaning of the instruction they precede. The whole instruction becomes: PC-2 end of previous instruction PC-1 prebyte PC opcode PC+1 additional word (0 to 2) according to the number of bytes required to compute the effective address These prebytes enable instruction in Y as well as indirect addressing modes to be implemented. They precede the opcode of the instruction in X or the instruction using direct addressing mode. The prebytes are: PDY 90 replace an X based instruction using immediate, direct, indexed, or inherent addressing mode by a Y one. PIX 92 replace an instruction using direct, direct bit, or direct relative addressing mode to an instruction using the corresponding indirect addressing mode. It also changes an instruction using X indexed addressing mode to an instruction using indirect X indexed addressing mode. PIY 91 replace an instruction using X indirect indexed addressing mode by a Y one. ) Shift and rotates SLL SRL SRA RLC RRC SWAP SLA Unconditional jump or call JRA JRT JRF JP CALL CALLR NOP RET Conditional branch JRxx Interruption management TRAP WFI HALT IRET Condition code flag modification SIM RIM SCF RCF Table 98. Instruction groups Description Instruction Memo Description Function/example Dst Src I1 H I0 N Z C ADC Add with Carry A = A + M + C A M H N Z C ADD Addition A = A + M A M H N Z C AND Logical And A = A . M A M N Z BCP Bit compare A, Memory tst (A . M) A M N Z BRES Bit Reset bres Byte, #3 M BSET Bit Set bset Byte, #3 M BTJF Jump if bit is false (0) btjf Byte, #3, Jmp1 M C BTJT Jump if bit is true (1) btjt Byte, #3, Jmp1 M C |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
New Zealand ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
