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Section 2 CPU
Rev. 4.00 Sep. 14, 2005 Page 41 of 982
REJ09B0023-0400
Table 2.4
DSR Register Bits
Bits Name
(Abbreviation)
Function
31 to 8
Reserved bits
0: Always read as 0; always use 0 as the write value
7
Signed Greater Than bit (GT) Indicates that the operation result is positive (except 0),
or that operand 1 is greater than operand 2
1: Operation result is positive, or operand 1 is greater
than operand 2
6
Zero bit (Z)
Indicates that the operation result is zero (0), or that
operand 1 is equal to operand 2
1: Operation result is zero (0), or operands are equal
5
Negative bit (N)
Indicates that the operation result is negative, or that
operand 1 is smaller than operand 2
1: Operation result is negative, or operand 1 is smaller
than operand 2
4
Overflow bit (V)
Indicates that the operation result has overflowed
1: Operation result has overflowed
3 to 1
Condition Select bits (CS)
Designate the mode for selecting the operation result
status to be set in the DC bit
Do not set these bits to 110 or 111
000: Carry/borrow mode
001: Negative value mode
010: Zero mode
011: Overflow mode
100: Signed greater mode
101: Signed greater than or equal to mode
0
DSP Condition bit (DC)
Sets the status of the operation result in the mode
designated by the CS bits
0: Designated mode status has not occurred (false)
1: Designated mode status has occurred
Note: After execution of a PADDC/PSUBC instruction, the DC bit sets the status of the operation
result in carry/borrow mode regardless of the CS bits.
Содержание HD6417641
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Страница 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
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Страница 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Страница 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Страница 500: ...Section 13 Direct Memory Access Controller DMAC Rev 4 00 Sep 14 2005 Page 450 of 982 REJ09B0023 0400...
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Страница 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Страница 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Страница 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Страница 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
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