HD64F3039F18 Datasheet, PDF (459/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 14 RAM
Section 14 RAM
14.1 Overview
The H8/3039 has 4 kbytes of on-chip static RAM, H8/3038 has 2 kbytes, H8/3037 has 1 kbyte,
and H8/3036 has 512 bytes. The RAM is connected to the CPU by a 16-bit data bus. The CPU
accesses both byte data and word data in two states, making the RAM suitable for rapid data
transfer.
The RAM enable bit (RAME) in the system control register (SYSCR) can enable or disable the
on-chip RAM.
Table 14.1 shows the address of the on-chip RAM in each operating mode.
Table 14.1 The Address of the On-Chip RAM in Each Operating Mode
Mode
Modes 1, 5, 7
Mode 3
Mode 6
H8/3039
(4 kbytes)
H'FEF10 to
H'FFF0F
H'FFEF10 to
H'FFFF0F
H'F710 to
H'FF0F
H8/3038
(2 kbytes)
H'FF710 to
H'FFF0F
H'FFF710 to
H'FFFF0F
H'F710 to
H'FF0F
H8/3037
(1k byte)
H'FFB10 to
H'FFF0F
H'FFFB10 to
H'FFFF0F
H'FB10 to
H'FF0F
H8/3036
(512 bytes)
H'FFD10 to
H'FFF0F
H'FFFD10 to
H'FFFF0F
H'FD10 to
H'FF0F
Rev.3.00 Mar. 26, 2007 Page 435 of 682
REJ09B0353-0300