R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 662

• Manufacturer Part Number: R5F61525
• Description: 32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 17 Flash Memory (0.18-(m F-ZTAT Version)
17.9.2
The software protection protects the flash memory against programming/erasing by disabling
download of the programming/erasing program, using the key code, and by the RAMER setting.
Table 17.13 Software Protection
17.9.3
Error protection is a mechanism for aborting programming or erasure when a CPU runaway
occurs or operations not according to the programming/erasing procedures are detected during
programming/erasing of the flash memory. Aborting programming or erasure in such cases
prevents damage to the flash memory due to excessive programming or erasing.
If an error occurs during programming/erasing of the flash memory, the FLER bit in FCCS is set
to 1 and the error protection state is entered.
• When an interrupt request, such as NMI, occurs during programming/erasing.
• When the flash memory is read from during programming/erasing (including a vector read or
• When a SLEEP instruction is executed (including software-standby mode) during
• When a bus master other than the CPU, such as the DMAC, obtains bus mastership during
Rev. 3.00 Mar. 14, 2006 Page 624 of 804
REJ09B0104-0300
Item
Protection
by SCO bit
Protection
by FKEY
Emulation
protection
an instruction fetch).
programming/erasing.
programming/erasing.
Software Protection
Error Protection
Description
The programming/erasing protection state is
entered when the SCO bit in FCCS is cleared to 0
to disable download of the programming/erasing
programs.
The programming/erasing protection state is
entered because download and
programming/erasing are disabled unless the
required key code is written in FKEY.
The programming/erasing protection state is
entered when the RAMS bit in the RAM emulation
register (RAMER) is set to 1.
Download
O
O
O
Function to be Protected
Programming/
Erasing
O
O
O