HD64F3039F18 Datasheet, PDF (463/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 15 ROM
Section 15 ROM
15.1 Overview
The H8/3039 has 128 kbytes of on-chip ROM (flash memory or mask ROM), the H8/3038 has 64
kbytes, the H8/3037 has 32 kbytes and H8/3036 has 16 kbytes. The ROM is connected to the CPU
by a 16-bit data bus. The CPU accesses both byte and word data in two states, enabling rapid data
transfer.
The mode pins (MD₂ to MD₀) can be set to enable or disable the on-chip ROM. See table 15.1.
The on-chip flash memory product (H8/3039F-ZTAT) can be erased and programmed on-board as
well as with a general-purpose PROM programmer.
Table 15.1 Operating Mode and ROM
Mode Pins
Mode
Mode 1
(1-Mbyte expanded mode with on-chip ROM disabled)
MD₂ MD₁ MD₀ On-Chip ROM
0
0
1
Disabled (external
address area)
Mode 2
0
1
0
(1-Mbyte expanded mode with on-chip ROM disabled)*
Mode 3
0
1
1
(16-Mbyte expanded mode with on-chip ROM disabled)
Mode 4
1
0
0
(16-Mbyte expanded mode with on-chip ROM disabled)*
Mode 5
1
0
1
Enabled
(16-Mbyte expanded mode with on-chip ROM enabled)
Mode 6 (single-chip normal mode)
1
1
0
Mode 7 (single-chip advanced mode)
1
1
1
Note: * Modes 2 and 4 cannot be used with this LSI. Do not set the mode pin to mode 2 or 4.
Rev.3.00 Mar. 26, 2007 Page 439 of 682
REJ09B0353-0300