HD64F38024HV Datasheet, PDF (215/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 7 RAM
Section 7 RAM
7.1 Overview
The H8/38024, H8/38023, H8/38022, H8/38124, H8/38123, H8/38122, H8/38024S, H8/38023S,
and H8/38022S have 1 Kbyte of high-speed static RAM on-chip, and the H8/38021, H8/38020,
H8/38121, H8/38120, H8/38021S, and H8/38020S have 512 bytes. The RAM is connected to the
CPU by a 16-bit data bus, allowing high-speed 2-state access for both byte data and word data.
7.1.1 Block Diagram
Figure 7.1 shows a block diagram of the on-chip RAM.
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'FB80
H'FB82
H'FB80
H'FB82
H'FB81
H'FB83
On-chip RAM
H'FF7E
H'FF7E
Even-numbered
address
H'FF7F
Odd-numbered
address
Figure 7.1 RAM Block Diagram (H8/38024)
Rev. 8.00 Mar. 09, 2010 Page 193 of 658
REJ09B0042-0800