HD6417750RF240V Datasheet, PDF (490/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 18 ROM
Internal address bus
Internal data bus (16 bits)
FLMCR1
FLMCR2
EBR1
EBR2
RAMER
Bus interface/controller
Operating
mode
FWE pin
Mode pin
Flash memory
(128 kbytes)
Legend:
FLMCR1: Flash memory control register 1
FLMCR2: Flash memory control register 2
EBR1: Erase block register 1
EBR2: Erase block register 2
RAMER: RAM emulation register
Figure 18.1 Block Diagram of Flash Memory
18.2 Mode Transitions
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 18.2. 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 write and erase the flash
memory.
The differences between boot mode and user program mode are shown in table 18.1.
Rev. 7.00 Sep. 11, 2009 Page 454 of 566
REJ09B0211-0700