HD64F3028F25 Datasheet, PDF (606/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

18.2 Flash Memory Version Features
The H8/3028F-ZTAT has 384 kbytes of on-chip flash memory.
The features of the flash memory are summarized below.
• Four flash memory operating modes
 Program mode
 Erase mode
 Program-verify mode
 Erase-verify mode
• Programming/erase methods
The flash memory is programmed 128 bytes at a time. Erasing is performed in block units. To
erase the entire flash memory, each block must be erased in turn. In block erasing, 4-kbyte, 32-
kbyte, and 64-kbyte blocks can be set arbitrarily.
• Programming/erase times
The flash memory programming time is 10 ms (typ.) for simultaneous 128-byte programming,
equivalent approximately to 80 µs (typ.) per byte, and the erase time is 100 ms (typ.) per block.
• Reprogramming capability
The flash memory can be reprogrammed up to 100 times.
• On-board programming modes
There are two modes in which flash memory can be programmed/erased/verified on-board:
 Boot mode
 User program mode
• Automatic bit rate adjustment
For data transfer in boot mode, the H8/3028F-ZTAT chip’s bit rate can be automatically
adjusted to match the transfer bit rate of the host.
• Flash memory emulation in RAM
Flash memory programming can be emulated in real time by overlapping a part of RAM onto
flash memory.
• Protect modes
There are three protect modes—hardware, software, and error—which allow protected status
to be designated for flash memory program/erase/verify operations
• PROM mode
Flash memory can be programmed/erased in PROM mode, using a PROM programmer, as
well as in on-board programming mode.
Rev. 2.00, 09/03, page 574 of 890