SH7263 Datasheet, PDF (1581/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 31 On-Chip RAM
Section 31 On-Chip RAM
This LSI has an on-chip high-speed RAM, which achieves fast access, and an on-chip RAM for
data retention, which can retain data in deep standby mode. These memory units can be used to
store instructions or data.
On-chip high-speed RAM operation and write access to the RAM can be enabled or disabled
through the RAM enable bits and RAM write enable bits.
Retention or non-retention of data by the on-chip RAM for data retention in deep standby mode is
selectable on a per-page basis.
31.1 Features
• Memory map
The on-chip RAM is located in the address spaces shown in tables 31.1 and 31.2.
Table 31.1 Address Spaces of On-Chip High-Speed RAM
Page
Page 0
Page 1
Page 2
Page 3
Address
H'FFF80000 to H'FFF83FFF
H'FFF84000 to H'FFF87FFF
H'FFF88000 to H'FFF8BFFF
H'FFF8C000 to H'FFF8FFFF
Table 31.2 Address Spaces of On-Chip RAM for Data Retention
Page
Page 0
Page 1
Page 2
Page 3
Address
H'FFFF8000 to H'FFFF8FFF
H'FFFF9000 to H'FFFF9FFF
H'FFFFA000 to H'FFFFAFFF
H'FFFFB000 to H'FFFFBFFF
Rev. 2.00 Mar. 14, 2008 Page 1547 of 1824
REJ09B0290-0200