SH7018 datasheet(389/431 Pages) RENESAS

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SH7018 Datasheet(PDF) 389 Page - Renesas Technology Corp

Part #	SH7018

Description	SuperH??RISC engine

PDF	431 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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389 / 431 page

373

Section 17 RAM

17.1

Overview

The SH7018 has 4 kbytes of on-chip RAM. The on-chip RAM is connected to the CPU by a 32-bit

data bus (figure 17.1). The CPU can access data in the on-chip RAM in 8, 16, or 32 bit widths.

On-chip RAM data can always be accessed in one state, making the RAM ideal for use as a

program area, stack area, or data area, which require high-speed access. The contents of the on-

chip RAM are held in sleep mode. Memory area addresses H'FFFFE000 to H'FFFFFFFF are

allocated to the on-chip RAM.

H'FFFFF000

H'FFFFF004

H'FFFFF001

H'FFFFF005

H'FFFFF002

H'FFFFF006

H'FFFFF003

H'FFFFF007

H'FFFFFFFC

H'FFFFFFFD

H'FFFFFFFE

H'FFFFFFFF

On-chip RAM

Internal data bus (32 bits)

Figure 17.1 Block Diagram of RAM

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