SH7050 Datasheet, PDF (657/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 19 ROM (256 kB Version)
19.11.9 Cautions Concerning Memory Programming
1. When programming addresses which have previously been programmed, carry out auto-
erasing before auto-programming.
2. When performing programming using PROM mode on a chip that has been
programmed/erased in an on-board programming mode, auto-erasing is recommended before
carrying out auto-programming.
Notes: 1. The flash memory is initially in the erased state when the device is shipped by Renesas.
For other chips for which the erasure history is unknown, it is recommended that auto-
erasing be executed to check and supplement the initialization (erase) level.
2. Auto-programming should be performed once only on the same address block.
Additional programming cannot be performed on previously programmed address
blocks.
19.12 Notes when Converting the F-ZTAT Application Software to the
Mask-ROM Versions
Please note the following when converting the F-ZTAT application software to the mask-ROM
versions.
The values read from the internal registers for the flash ROM of the mask-ROM version and F-
ZTAT version differ as follows.
Status
Register Bit
F-ZTAT Version
Mask-ROM Version
FLMCR1 FWE
0: Application software running
0: Is not read out
1: Programming
1: Application software running
Note: This difference applies to all the F-ZTAT versions and all the mask-ROM versions that have
different ROM size.
Rev. 5.00 Jan 06, 2006 page 637 of 818
REJ09B0273-0500