 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ATAR890 Datasheet(PDF) 5 Page - ATMEL Corporation |
|
||||||||||||||||||||||||||||||
ATAR890 Datasheet(HTML) 5 Page - ATMEL Corporation |
|
|
5 / 75 page  5 ATAR090/ATAR890 4696C–4BMCU–02/04 Figure 5. RAM Map Registers The MARC4 controller has seven programmable registers and one condition code regis- ter. They are shown in the following programming model (see Figure 6). Program Counter (PC) The program counter is a 12-bit register which contains the address of the next instruc- tion to be fetched from ROM. Instructions currently being executed are decoded in the instruction decoder to determine the internal micro-operations. For linear code (no calls or branches) the program counter is incremented with every instruction cycle. If a branch-, call-, return-instruction or an interrupt is executed, the program counter is loaded with a new address. The program counter is also used with the table instruction to fetch 8-bit wide ROM constants. Figure 6. Programming Model RAM FCh 00h Autosleep FFh 03h 04h X Y SP RP TOS-1 Expression stack Return stack Global variables 07h (256 x 4-bit) Global variables 4-bit TOS TOS-1 TOS-2 30 SP Expression stack Return stack 0 11 12-bit RP v TOS CCR 0 3 0 3 0 7 0 7 0 7 0 11 RP SP X Y PC -- B I Program counter Return stack pointer Expression stack pointer RAM address register (X) RAM address register (Y) Top of stack register Condition code register Carry/borrow Branch Interrupt enable Reserved 0 7 C 0 0 |
Similar Part No. - ATAR890 |
|
Similar Description - ATAR890 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
