Section 2 CPU
Rev. 2.00 Mar 09, 2006 page 35 of 906
REJ09B0292-0200
Table 2.1
SR Register Bits
Bit
Name (Abbreviation)
Function
27–16
Repeat counter (RC)
Designate the repeat count (2–4095) for repeat (loop)
control
11
Y pointer usage modulo
addressing designation
(DMY)
1: modulo addressing mode becomes valid for Y
memory address pointer, Ay (R6, R7)
10
X pointer usage modulo
addressing designation
(DMX)
1: modulo addressing mode becomes valid for X
memory address pointer, Ax (R4, R5)
9
M bit
Used by the DIV0S/U, DIV1 instructions
8
Q bit
Used by the DIV0S/U, DIV1 instructions
7–4
Interrupt request mask
(I3–I0)
Indicate the receive level of an interrupt request (0 to
15)
3–2
Repeat flags (RF1, RF0) Used in zero overhead repeat (loop) control. Set as
below for an SETRC instruction
For 1 step repeat 00 RE—RS=–4
For 2 step repeat 01 RE—RS=–2
For 3 step repeat 11 RE—RS=0
For 4 steps or more 10 RE—RS>0
1
Saturation arithmetic bit
(S)
Used with MAC instructions and DSP instructions
1: Designates saturation arithmetic (prevents
overflows)
0
T bit
For MOVT, CMP/cond, TAS, TST, BT, BT/S, BF,
BF/S, SETT, CLRT and DT instructions,
0: represents false
1: represents true
For ADDV/ADDC, SUBV/SUBC, DIV0U/DIV0S, DIV1,
NEGC, SHAR/SHAL, SHLR/SHLL, ROTR/ROTL and
ROTCR/ROTCL instructions,
1: represents occurrence of carry, borrow, overflow or
underflow
31–28
15–12
0 bit
0: 0 is always read out; write a 0
Содержание SH7616
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Страница 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Страница 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Страница 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Страница 662: ...Section 14 Serial Communication Interface with FIFO SCIF Rev 2 00 Mar 09 2006 page 636 of 906 REJ09B0292 0200 ...
Страница 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Страница 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Страница 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Страница 935: ...SH7616 Hardware Manual ...