h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 787

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Note: The H8S/2635 Group is not equipped with a DTC.
20.1
The H8S/2636 has 4 kbytes, and H8S/2638, H8S/2639, and H8S/2630 have 16 kbytes of on-chip
high-speed static RAM. The H8S/2635 has 6 kbytes of on-chip RAM. The RAM is connected to
the CPU by a 16-bit data bus, enabling one-state access by the CPU to both byte data and word
data. 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).
20.1.1
Figure 20-1 shows a block diagram of the on-chip RAM.
Overview
Block Diagram
Figure 20-1 (a) Block Diagram of RAM (H8S/2636)
H'FFE000
H'FFE002
H'FFE004
H'FFEFBE
H'FFFFC0
H'FFFFFE
Section 20 RAM
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'FFEFBF
H'FFFFC1
Rev. 6.00 Feb 22, 2005 page 727 of 1484
H'FFFFFF
H'FFE001
H'FFE003
H'FFE005
REJ09B0103-0600
Section 20 RAM