HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 225

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

used to invalidate a specific entry in the cache. When the U bit of the entry that has received a hit
is 1 at this point, writing back should be performed. However, when 0 is written to the V bit, 0
must also be written to the U bit of that entry.
5.4.2
Data Array
The data array is mapped onto H'F1000000 to H'F1FFFFFF. To access a data array, the 32-bit
address field (for read/write accesses) and 32-bit data field (for write accesses) must be specified.
The address field specifies information for selecting the entry to be accessed; the data field
specifies the longword data to be written to the data array.
In the address field, specify the entry address for selecting the entry, L for indicating the longword
position within the (16-byte) line, W for selecting the way, and H'F1 for indicating data array
access. As for L, B'00 indicates longword 0, B'01 indicates longword 1, B'10 indicates longword
2, and B'11 indicates longword 3. As for W, B'00 indicates way 0, B'01 indicates way 1, B'10
indicates way 2, and B'11 indicates way 3).
Since access size of the data array is fixed at longword, bits 1 and 0 of the address field should be
set to B'00.
Figure 5.4 shows the address and data formats.
The following two operations on the data array are available. The information in the address array
is not affected by these operations.
Data-Array Read: Read the data specified by L of the address filed, from the entry that
corresponds to the entry address and the way that is specified by the address filed.
Data-Array Write: Write the longword data specified by the data filed, to the position specified
by L of the address field, in the entry that corresponds to the entry address and the way specified
by the address field.
Rev. 1.00, 02/04, page 187 of 804