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Section 7 RAM
7.1
Overview
The H8/3822R and H8/3823R have 1 kbyte of high-speed static RAM on-chip, and the H8/3824R,
H8/3825R, H8/3826R, and H8/3827R have 2 kbytes. 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.
H'FF7E
H'FF7F
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Even-numbered
address
Odd-numbered
address
H'FF7E
H'F782
H'F780
H'F780
H'F782
H'F781
H'F783
On-chip RAM
Figure 7.1 RAM Block Diagram (H8/3824R)