HD6473847RHV Datasheet, PDF (175/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 6 ROM
6.5 Overview of Flash Memory
6.5.1 Features
The features of the 32-kbyte or 16-kbyte flash memory built into the flash memory version are
summarized below.
• Programming/erase methods
⎯ The flash memory is programmed 128 bytes at a time. Erase is performed in single-block
units. The flash memory of the HD64F38004 and HD64F38104 are configured as follows:
1 kbyte × 4 blocks and 28 kbytes × 1 block. The flash memory of the HD64F38002 and
HD64F38102 are configured as follows: 1 kbyte × 4 blocks and 12 kbytes × 1 block. To
erase the entire flash memory, each block must be erased in turn.
• On-board programming
⎯ On-board programming/erasing can be done in boot mode, in which the boot program built
into the chip is started to erase or program of the entire flash memory. In normal user
program mode, individual blocks can be erased or programmed.
• Programmer mode
⎯ Flash memory can be programmed/erased in programmer mode using a PROM
programmer, as well as in on-board programming mode.
• Automatic bit rate adjustment
⎯ For data transfer in boot mode, this LSI's bit rate can be automatically adjusted to match
the transfer bit rate of the host.
• Programming/erasing protection
⎯ Sets software protection against flash memory programming/erasing.
• Power-down mode
⎯ Operation of the power supply circuit can be partly halted in subactive mode. As a result,
flash memory can be read with low power consumption.
Note: The system clock oscillator must be used when programming or erasing the flash memory
of the HD64F38104 and HD64F38102.
Rev. 7.00 Mar. 08, 2010 Page 143 of 510
REJ09B0024-0700