Ram; Overview; Block Diagram - Hitachi H8S/2199 Hardware Manual

Single-chip microcomputer

Table of Contents

The H8S/2199, H8S/2198, H8S/2197, and H8S/2196 have 3 kbytes of on-chip high-speed static

RAM, and the H8S/2199 F-ZTAT has 8 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.

Figure 8.1 shows a block diagram of the on-chip RAM.

Section 8 RAM

Internal data bus (upper 8 bits)

Internal data bus (lower 8 bits)

Figure 8.1 Block Diagram of RAM (H8S/2199)

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