NEC V850/SA1 mPD703015 Preliminary User's Manual page 57

(2) Program Status Word (PSW)
After reset: 00000020H
Symbol 31
PSW
RFU
NP
EP
ID
SAT
CY
OV
S
Z
CHAPTER 3 CPU FUNCTIONS
RFU
Reserved field (fixed to 0).
Indicates that NMI processing is in progress. This flag is set when NMI is accepted, and
disables multiple interrupts.
Indicates that an exception processing is in progress. This flag is set at the generation of
exception. The interrupt request is acknowledged even if this bit is set.
Indicates that accepting external interrupt request is disabled.
This flag is set if result of executing saturated operation instruction overflows. If overflow
does not occur, value of previous operation is held.
This flag is set if carry or borrow occurs as result of operation. If carry or borrow does not
occur, it is reset.
This flag is set if overflow occurs during operation (if overflow does not occur, it is reset).
This flag is set if result of operation is negative. It is reset if result is positive.
This flag is set if result of operation is zero. If result is not zero, it is reset.
8 7 6 5 4 3
NP EP ID SAT CY
2 1 0
OV S Z
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