Features - Renesas F-ZTAT H8 Series Hardware Manual

Section 19 Flash Memory (H8/3048F: Dual Power Supply (V
19.2.3

Features

Features of the flash memory are listed below.
• Five flash memory operating modes
The flash memory has five operating modes: program mode, program-verify mode, erase
mode, erase-verify mode, and prewrite-verify mode.
• Block erase designation
Blocks to be erased in the flash memory address space can be selected by bit settings. The
address space includes a large-block area (eight blocks with sizes from 12 kbytes to 16 kbytes)
and a small-block area (eight 512-byte blocks).
• Program and erase time
Programming one byte of flash memory typically takes 50 µs. Erasing all blocks (128 kbytes)
typically takes 1 s.
• Erase-program cycles
Flash memory contents can be erased and reprogrammed up to 100 times.
• On-board programming modes
These modes can be used to program, erase, and verify flash memory contents. There are two
modes: boot mode, and user programming mode.
• Automatic bit-rate alignment
In boot-mode data transfer, the H8/3048F aligns its bit rate automatically to the host bit rate
(9600 bps, 4800 bps and 2400 bps).
• Flash memory emulation by RAM
Part of the RAM area can be overlapped onto flash memory, to emulate flash memory updates
in real time.
• PROM mode
As an alternative to on-board programming, the flash memory can be programmed and erased
in PROM mode, using a general-purpose PROM programmer.
• Protect modes
Flash memory can be program-, erase-, and/or verify-protected in hardware and software
protect modes.
Rev. 7.00 Sep 21, 2005 page 586 of 878
REJ09B0259-0700
= 12 V))
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