HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 567

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

Section 15 RAM
Section 15 RAM
15.1
Overview
The H8S/2246, H8S/2244, and H8S/2242 have 8 kbytes of on-chip high-speed static RAM, and
the H8S/2245, H8S/2243, H8S/2241, and H8S/2240 have 4 kbytes. The on-chip RAM is
connected to the CPU by a 16-bit data bus, enabling both byte data and word data to be accessed
in one state. This makes it possible to perform fast word data transfer.
The on-chip RAM on the H8S/2246, H8S/2244, and H8S/2242 is located in addresses H'E400 to
H'FBFF (6 kbytes) in normal mode (modes 1 to 3), and in addresses H'FFDC00 to H'FFFBFF (8
kbytes) in advanced mode (modes 4 to 7).
The on-chip RAM on the H8S/2245, H8S/2243, H8S/2241, and H8S/2240 is located in addresses
H'EC00 to H'FBFF (4 kbytes) in normal mode (modes 1 to 3), and in addresses H'FFEC00 to
H'FFFBFF (4 kbytes) in advanced mode (modes 4 to 7).
The on-chip RAM can be enabled or disabled by means of the RAM enable bit (RAME) in the
system control register (SYSCR).
Rev.3.00 Mar. 26, 2007 Page 525 of 772
REJ09B0355-0300