HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 191

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 6 Bus Controller
6.3.5
Areas in Normal Mode
In normal mode, a 64-kbyte address space comprising part of area 0 is controlled. Area
partitioning is not performed in normal mode. In ROM-disabled expansion mode, the space
excluding the on-chip RAM and internal I/O registers is external space. In ROM-enabled
expansion mode the space excluding the on-chip ROM, on-chip RAM, and internal I/O registers is
external space. The on-chip RAM is enabled when the RAME bit in the system control register
(SYSCR) is set to 1; when the RAME bit is cleared to 0, the on-chip RAM is disabled and the
corresponding addresses become external space.
When external space is accessed, the CS0 signal can be output.
In normal mode, the basic bus interface or burst ROM interface can be selected.
Rev.3.00 Mar. 26, 2007 Page 149 of 772
REJ09B0355-0300