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HD6417709S Datasheet(PDF) 10 Page - Renesas Technology Corp |
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HD6417709S Datasheet(HTML) 10 Page - Renesas Technology Corp |
10 / 807 page Rev. 5.0, 09/03, page x of xliv Section Page Description 5.4.3 Examples of Usage 115, 116 (1) Invalidating a Specific Entry Description amended A specific cache entry can be invalidated by accessing the allocated memory cache and writing a 0 to the entry’s U and V bits. The A bit is cleared to 0, and an address is specified for the entry address and the way. If the U bit of the way of the entry in question was set to 1, the entry is written back and the V and U bits specified by the write data are written to. In the following example, the write data is specified in R0 and the address is specified in R1. ; R0 = H'0000 0000 LRU = H'000, U = 0, V = 0 ; R1 = H'F000 1080, Way = 1, Entry = H'08, A = 0 ; MOV.L R0, @R1 To invalidate all entries and ways, write 0 to the following addresses. Addresses F000 0000 F000 0010 F000 0020 : F000 3FF0 This involves a total of 1,024 writes. The above operation should be performed using a non-cacheable area. (2) Invalidating a Specific Address Newly added (3) Reading Data from a Specific Entry Description amended ; R0 = H'F100 004C; Data array access, Entry = H'04, ; Way = 0, Longword address = 3 ; MOV.L R0, @R1 ; Longword 3 is read. 6.2.6 Interrupt Exception Handling and Priority Table 6.4 Interrupt Exception Handling Sources and Priority (IRQ Mode) 127 IPR (bit numbers) for SCI amended (Before)IPRB(3-0) → (After)IPRB(7-4) 6.3.6 Interrupt Request Register 0 (IRR0) 138 Description amended When clearing an IRQ5R–IRQ0R bit to 0, read the bit while bit set to 1, and then write 0. In this case, 0 should be written only to the bits to be cleared and 1 to the other bits. The contents of the bits to which 1 is written do not change. 8.2.1 Standby Control Register (STBCR) 184 Description added Bit 1—Module Standby 1 (MSTP1) Before switching the RTC to module standby, access at least one among the registers RTC, SCI, and TMU. |
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