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SH7721 Datasheet(PDF) 207 Page - Renesas Technology Corp

Part # SH7721
Description  Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
PDF  1524 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7721 Datasheet(HTML) 207 Page - Renesas Technology Corp

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Section 3 DSP Operating Unit
Rev. 3.00 Jan. 18, 2008 Page 145 of 1458
REJ09B0033-0300
31
31
0
ALU
H'00008000
39
39
0
Cleared to 0
Source 1 or 2
DSR
GT
Z
N
V
DC
Guard
Guard
Figure 3.20 Rounding Operation Flow
0
H'00 0002
H'00 0001
Rounded result
Analog value
True value
Figure 3.21 Definition of Rounding Operation
Table 3.30
Variation of Rounding Operation
Mnemonic
Function
Source 1
Source 2
Destination
PRND
Rounding
Sx
Dz
Sy
Dz
• Overflow Protection
The S bit in SR is effective for any rounding operations in the DSP unit. See section 3.5.11,
Overflow Protection, for details.



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