Figure 20.1 Block Diagram Of Flash Memory - Renesas H8S/2437 Hardware Manual

• Programming/erasing protection
Sets protection against flash memory programming/erasing via hardware, software, or error
protection.
• Programmer mode
This mode uses the PROM programmer. The user MAT and user boot MAT can be
programmed.
FWE pin
Mode pin
[Legend]
FCCS:
FPCS:
FECS:
FKEY:
FMATS: Flash MAT select register
FTDAR: Flash transfer destination address register
Note:
Rev. 1.00, 09/03, page 526 of 704
Internal address bus
Internal data bus (16 bits)
FCCS
FPCS
FECS
FKEY
Control unit
FMATS
FTDAR
Operating
mode
Flash code control/status register
Flash program code select register
Flash erase code select register
Flash key code register
To read from or write to the registers, the FLSHE bit in the system control
register (SYSCR) must be set to 1.

Figure 20.1 Block Diagram of Flash Memory

Memory MAT unit
User MAT: 256 kbytes
User boot MAT: 8 kbytes
Flash memory