 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
UPD703214GCA1-XXX-8EU Datasheet(PDF) 60 Page - NEC |
|
||||||||||||||||||||||||||||||
UPD703214GCA1-XXX-8EU Datasheet(HTML) 60 Page - NEC |
|
|
60 / 861 page  CHAPTER 3 CPU FUNCTIONS User’s Manual U16890EJ1V0UD 60 (4) Program status word (PSW) The program status word (PSW) is a collection of flags that indicate the program status (instruction execution result) and the CPU status. When the contents of this register are changed using the LDSR instruction, the new contents become valid immediately following completion of LDSR instruction execution. Interrupt request acknowledgment is held pending while a write to the PSW is being executed by the LDSR instruction. Bits 31 to 8 are reserved (fixed to 0) for future function expansion. (1/2) 31 0 PSW RFU After reset 00000020H 87 NP 6 EP 5 ID 4 SAT 3 CY 2 OV 1 SZ Bit position Flag name Description 31 to 8 RFU Reserved field. Fixed to 0. 7 NP Indicates that non-maskable interrupt (NMI) servicing is in progress. This flag is set to 1 when an NMI request is acknowledged, and disables multiple interrupts. 0: NMI servicing not in progress 1: NMI servicing in progress 6 EP Indicates that exception processing is in progress. This flag is set to 1 when an exception occurs. Moreover, interrupt requests can be acknowledged even when this bit is set. 0: Exception processing not in progress 1: Exception processing in progress 5 ID Indicates whether maskable interrupt request acknowledgment is enabled. 0: Interrupt enabled 1: Interrupt disabled 4 SAT Note Indicates that the result of executing a saturated operation instruction has overflowed and that the calculation result is saturated. Since this is a cumulative flag, it is set to 1 when the result of a saturated operation instruction becomes saturated, and it is not cleared to 0 even if the operation results of successive instructions do not become saturated. This flag is neither set nor cleared when arithmetic operation instructions are executed. 0: Not saturated 1: Saturated 3 CY Indicates whether carry or borrow occurred as the result of an operation. 0: No carry or borrow occurred 1: Carry or borrow occurred 2 OV Note Indicates whether overflow occurred during an operation. 0: No overflow occurred 1: Overflow occurred. 1 S Note Indicates whether the result of an operation is negative. 0: Operation result is positive or 0. 1: Operation result is negative. 0 Z Indicates whether operation result is 0. 0: Operation result is not 0. 1: Operation result is 0. Remark Note is explained on the following page. |
Similar Part No. - UPD703214GCA1-XXX-8EU |
|
Similar Description - UPD703214GCA1-XXX-8EU |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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
