SH7751 Datasheet, PDF (987/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

22. PCI Controller (PCIC)
If you specify all zeros, a 1MB space is reserved. You can specify an address space up to 512MB.
Refer to table 22.6 in section 22.2.6, PCI Configuration Register 5 (PCICONF5).
Bits 31 to 29—Reserved: These bits always return 0 when read. Always write 0 to these bits
when writing.
Bits 28 to 20—Capacities of the Local Address Spaces 0, 1 (PLSR28 to 20): These bits specify
the capacities of the address space 0 and address space 1 in bytes. Specifying (capacity –1) bytes.
A 1MB space is secured if all zeros are specified.
Bits 19 to 0—Reserved: These bits always return 0 when read. Always write 0 to these bits.
Rev.4.00 Oct. 10, 2008 Page 889 of 1122
REJ09B0370-0400