SH7760 Datasheet, PDF (203/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

The following two kinds of operation can be used on the IC data array:
1. IC data array read
Longword data is read into the data field from the data specified by the longword specification
bits in the address field in the IC entry corresponding to the entry set in the address field.
2. IC data array write
The longword data specified in the data field is written for the data specified by the longword
specification bits in the address field in the IC entry corresponding to the entry set in the
address field.
31
24 23
Address field _{1 1 1 1 0 0 0 1}
13 12
Entry
54 210
L
31
0
Data field
Longword data
L : Longword specification bits
: Reserved bits (write value should be 0, and read value is undefined )
Figure 7.6 Memory-Mapped IC Data Array
7.5.3 OC Address Array
The OC address array is allocated to addresses H'F400 0000 to H'F4FF FFFF in the P4 area. An
address array access requires a 32-bit address field specification (when reading or writing) and a
32-bit data field specification. The entry to be accessed is specified in the address field, and the
write tag, U bit, and V bit are specified in the data field.
In the address field, bits [31:24] have the value H'F4 indicating the OC address array, and the
entry is specified by bits [13:5]. The OIX and ORA bits in CCR have no effect on this entry
specification. The association bit (A bit) [3] in the address field specifies whether or not
association is performed when writing to the OC address array. As only longword access is used, 0
should be specified for address field bits [1:0].
In the data field, the tag is indicated by bits [31:10], the U bit by bit [1], and the V bit by bit [0].
As the OC address array tag is 19 bits in length, data field bits [31:29] are not used in the case of a
write in which association is not performed. Data field bits [31:29] are used for the virtual address
specification only in the case of a write in which association is performed.
Rev. 1.0, 02/03, page 153 of 1294