HD64F3048VTF8 Datasheet, PDF (605/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

Section 18 ROM (H8/3048F-ONE: Single Power Supply, H8/3048B Mask ROM Version)
*1, *3
Reset state
User mode
RES = 0
*3 _{RES = 0}
RES = 0
*2
FWE = 1 FWE = 0
User
*1
program mode
*3 _{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 H8/3048F-ONE is placed in PROM mode by means of a dedicated PROM writer.
3. Mode settings are shown in the following table.
4. For pins RXD1 and TXD1, use on-board pull-up in boot mode.
Mode
Mode 1
Mode 2
Mode 3
Mode 4
Mode 5
Mode 6
Mode 7
FWE
0
MD₂
0
0
0
1
1
1
1
Pins
MD₁
0
1
1
0
0
1
1
MD₀
1
0
1
0
1
0
1
RXD1
0, 1
0, 1
0, 1
0, 1
0, 1
0, 1
0, 1
Boot mode 5
Boot mode 6
Boot mode 7
1
0
0
1
1*⁴
0
1
0
1*⁴
0
1
1
1*⁴
Setting prohibited
1
0
0
1
User program mode 5
User program mode 6
User program mode 7
1
0
1 0, 1
1
1
0 0, 1
1
1
1 0, 1
Figure 18.2 Flash Memory State Transitions
Rev. 3.00 Sep 27, 2006 page 577 of 872
REJ09B0325-0300