h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 568

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 19 ROM
• Emulation function for flash memory in RAM
19.2
When the mode pins and the FWE pin are set in the reset state and a reset-start is executed, this
LSI enters an operating mode as shown in figure 19.2. In user mode, flash memory can be read but
not programmed or erased.
The boot, user program, and programmer modes are provided as modes to program and erase the
flash memory.
The differences between boot mode and user program mode are shown in table 19.1.
Rev. 2.00 Dec. 05, 2005 Page 530 of 724
REJ09B0200-0200
The real-time emulation for programming of flash memory is possible by overlapping the flash
memory to a part of RAM.
Mode Transitions
[Legend]
FLMCR1:
FLMCR2:
EBR1:
EBR2:
RAMER:
FLPWCR: Flash memory power control register
Flash memory control register 1
Flash memory control register 2
Erase block register 1
Erase block register 2
RAM emulation register
Figure 19.1 Block Diagram of Flash Memory
FLPWCR
FLMCR1
FLMCR2
RAMER
EBR1
EBR2
Internal data bus (16 bits)
Internal address bus
Bus interface/controller
Flash memory
Operating
mode
FWE pin
Mode pin