H8S2245 datasheet(567/818 Pages) RENESAS

Part #	H8S2245

Description	Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series

PDF	818 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 15 RAM

Rev.3.00 Mar. 26, 2007 Page 525 of 772

REJ09B0355-0300

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).

H8S2245 Datasheet(PDF) 567 Page - Renesas Technology Corp