h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 711

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

21.1
The H8S/2169 or H8S/2149 has 2 kbytes of on-chip high-speed static RAM. The on-chip RAM is
connected to the bus master 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 can be enabled or disabled by means of the RAM enable bit (RAME) in the
system control register (SYSCR).
21.1.1
Figure 21.1 shows a block diagram of the on-chip RAM.
Overview
Block Diagram
Figure 21.1 Block Diagram of RAM
H'FFEFFE
H'FFFF7E
H'FFE880
H'FFE882
H'FFE884
H'FFFF00
Section 21 RAM
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'FFEFFF
H'FFFF7F
H'FFE881
H'FFE883
H'FFE885
H'FFFF01
Rev. 3.00 Jan 18, 2006 page 683 of 1044
REJ09B0280-0300
Section 21 RAM