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SH7041A датащи(PDF) 196 Page - Renesas Technology Corp |
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SH7041A датащи(HTML) 196 Page - Renesas Technology Corp |
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196 / 923 page ![]() 158 • Bit 3—CS3 Space Cache Enable (CECS3): Selects whether to use CS3 space as a cache object (enable) or to exclude it (disable). A 0 disables, and a 1 enables such use. Bit 3 (CECS3) Description 0 CS3 space cache disabled (initial value) 1 CS3 space cache enabled • Bit 2—CS2 Space Cache Enable (CECS2): Selects whether to use CS2 space as a cache object (enable) or to exclude it (disable). A 0 disables, and a 1 enables such use. Bit 2 (CECS2) Description 0 CS2 space cache disabled (initial value) 1 CS2 space cache enabled • Bit 1—CS1 Space Cache Enable (CECS1): Selects whether to use CS1 space as a cache object (enable) or to exclude it (disable). A 0 disables, and a 1 enables such use. Bit 1 (CECS1) Description 0 CS1 space cache disabled (initial value) 1 CS1 space cache enabled • Bit 0—CS0 Space Cache Enable (CECS0): Selects whether to use CS0 space as a cache object (enable) or to exclude it (disable). A 0 disables, and a 1 enables such use. Bit 0 (CECS0) Description 0 CS0 space cache disabled (initial value) 1 CS0 space cache enabled 9.3 Address Array and Data Array There is a special cache space for controlling the cache. This space is divided into an address array and a data array, where addresses (tag address, including valid bit) and data (4-byte line length) for cache control are recorded. The special cache space is shown in table 9.2. It can be used as on-chip RAM space when the cache is not being used. |
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