HD6473032F16 Datasheet, PDF (587/847 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Section 18 ROM
The boot, user program and PROM modes are provided as modes to write and erase the flash
memory.
*1, *3
Reset state
User mode
FWE = 1 FWE = 0
RES = 0
*3
RES = 0
*3
User
*1
program mode
RES = 0
*2
RES = 0
PROM mode
On-board programming mode
Boot mode
Notes: Only make a transition between user mode and user program mode when the CPU is not accessing
the flash memory.
1. RAM emulation possible
2. The H8/3052F is placed in PROM mode by means of a dedicated PROM writer.
3. Mode settings are shown in the following table.
Mode
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
Boot mode 5
Boot mode 6
Boot mode 7
FWE
0
1
Pins
MD₂
0
0
0
1
1
1
1
MD₁
0
1
1
0
0
1
1
0
0
0
1
0
1
MD₀
1
0
1
0
1
0
1
1
0
1
Setting prohibited
1
0
0
User program mode 5
User program mode 6
User program mode 7
1
0
1
1
1
0
1
1
1
Figure 18.2 Flash Memory State Transitions
Rev. 3.00 Mar 21, 2006 page 557 of 814
REJ09B0302-0300