Section 18 Rom (H8/3048Ztat And Mask-Rom Versions); Overview - Renesas F-ZTAT H8 Series Hardware Manual

(H8/3048ZTAT and Mask-ROM Versions)
18.1

Overview

The H8/3048 has 128 kbytes of on-chip ROM, the H8/3047 has 96 kbytes, the H8/3045 has
64 kbytes and the H8/3044 has 32 kbytes. The ROM is connected to the CPU by a 16-bit data bus.
The CPU accesses both byte data and word data in two states, enabling rapid data transfer.
The mode pins (MD
2
table 18.1.
Table 18.1 Operating Mode and ROM
Mode
Mode 1
(1-Mbyte expanded mode with on-chip ROM disabled)
Mode 2
(1-Mbyte expanded mode with on-chip ROM disabled)
Mode 3
(16-Mbyte expanded mode with on-chip ROM disabled)
Mode 4
(16-Mbyte expanded mode with on-chip ROM disabled)
Mode 5
(1-Mbyte expanded mode with on-chip ROM enabled)
Mode 6
(16-Mbyte expanded mode with on-chip ROM enabled)
Mode 7 (single-chip mode)
The PROM version (H8/3048ZTAT) can be set to PROM mode and programmed with a general-
purpose PROM programmer.
Note: Care is required when changing from the H8/3048F-ONE to a model with on-chip mask
ROM (H8/3048, H8/3047, H8/3045, or H8/3044).
For details, refer to the H8/3048F-ONE Hardware Manual (Rev. 1.0) 1.4.5, Note on
Changeover to Mask ROM Version.
Section 18 ROM
to MD ) can be set to enable or disable the on-chip ROM as indicated in
0
Mode Pins
MD MD MD
2 1 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Rev. 7.00 Sep 21, 2005 page 569 of 878
Section 18 ROM
On-Chip ROM
Disabled
(external
address area)
Enabled
REJ09B0259-0700