 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
R5F72115D160FPV Datasheet(PDF) 44 Page - Renesas Technology Corp |
|
|
|||||||||||||||||||||||||||||
R5F72115D160FPV Datasheet(HTML) 44 Page - Renesas Technology Corp |
|
|
44 / 1228 page  Section 2 CPU Rev. 2.00 May. 08, 2008 Page 20 of 1200 REJ09B0344-0200 2.2 Data Formats 2.2.1 Data Format in Registers Register operands are always longwords (32 bits). If the size of memory operand is a byte (8 bits) or a word (16 bits), it is changed into a longword by expanding the sign-part when loaded into a register. 31 0 Longword Figure 2.4 Data Format in Registers 2.2.2 Data Formats in Memory Memory data formats are classified into bytes, words, and longwords. Memory can be accessed in 8-bit bytes, 16-bit words, or 32-bit longwords. A memory operand of fewer than 32 bits is stored in a register in sign-extended or zero-extended form. A word operand should be accessed at a word boundary (an even address of multiple of two bytes: address 2n), and a longword operand at a longword boundary (an even address of multiple of four bytes: address 4n). Otherwise, an address error will occur. A byte operand can be accessed at any address. Only big-endian byte order can be selected for the data format. Data formats in memory are shown in figure 2.5. 31 0 15 23 7 Byte Byte Byte Byte Word Word Address 2n Address 4n Longword Address m Address m + 2 Address m + 1 Address m + 3 Figure 2.5 Data Formats in Memory |
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
