HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 719

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 19.8 shows a sample procedure for flash memory block area overlapping.
1. The RAM area to be overlapped is fixed at a 4-kbyte area in the range H'FFFFE000 to
2. The flash memory area to be overlapped is selected by RAMER from a 4-kbyte area of the
3. The overlapped RAM area can be accessed from both the flash memory addresses and RAM
4. When the RAMS bit in RAMER is set to 1, program/erase protection is enabled for all flash
5. A RAM area cannot be erased by execution of software in accordance with the erase
6. Block area EB0 contains the vector table. When performing RAM emulation, the vector table
H'FFFFEFFF.
EB0 to EB7 blocks.
addresses.
memory blocks (emulation protection). In this state, setting the P or E bit in FLMCR1 to 1
does not cause a transition to program mode or erase mode.
algorithm.
is needed in the overlapped RAM.
Figure 19.8 Example of RAM Overlap Operation (RAM[2:0] = B'000)
H'3FFFF
H'00000
H'01000
H'02000
H'03000
H'04000
H'05000
H'06000
H'07000
H'08000
Flash Memory
EB8 to EB11
EB0
EB1
EB2
EB3
EB4
EB5
EB6
EB7
This area can be accessed from
both the flash memory addresses
and RAM addressed.
Rev.4.00 Mar. 27, 2008 Page 675 of 882
On-chip RAM
19. Flash Memory (F-ZTAT Version)
H'FFFFE000
H'FFFFEFFF
H'FFFFFFFF
REJ09B0108-0400