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SH7713 датащи(PDF) 79 Page - Renesas Technology Corp |
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SH7713 датащи(HTML) 79 Page - Renesas Technology Corp |
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79 / 904 page ![]() Section 2 CPU Rev.1.50 Aug. 30, 2006 Page 39 of 860 REJ09B0288-0150 Bit Bit Name Initial Value R/W Description 28 BL 1 R/W Block Specifies whether an exception, interrupt, or user break is enabled or not. 0: Enables an exception, interrupt, or user break. 1: Disables an exception, interrupt, or user break. The BL bit is set to 1 in reset or exception handling state. 27 to 10 All 0 R Reserved These bits are always read as 0. The write value should always be 0. 9 8 M Q R/W R/W M Bit Q Bit These bits are used by the DIV0S, DIV0U, and DIV1 instructions. These bits can be changed even in user mode by using the DIV0S, DIV0U, and DIV1 instructions. These bits are undefined at reset. These bits do not change in an exception handling state. 7 to 4 I3 to I0 All 1 R/W Interrupt Mask Indicates the interrupt mask level. These bits do not change even if an interrupt occurs. At reset, these bits are initialized to B'1111. These bits are not affected in an exception handling state. 3, 2 All 0 R Reserved These bits are always read as 0. The write value should always be 0. 1 S R/W Saturation Mode Specifies the saturation mode for multiply instructions or multiply and accumulate instructions. This bit can be specified by the SETS and CLRS instructions in user mode. At reset, this bit is undefined. This bit is not affected in an exception handling state. |
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