Section 7 Rom - Renesas H8 Series Hardware Manual

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 is configured as follows: 1 kbyte × 4 blocks and 28 kbytes × 1
block in the H8/36094F, and 1 kbyte × 4 blocks and 12 kbytes × 1 block in the H8/36092F.
To erase the entire flash memory, each block must be erased in turn.
• Reprogramming capability
 The flash memory can be reprogrammed up to 1,000 times.
• 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.

Section 7 ROM

Rev. 1.00 Aug. 28, 2006 Page 97 of 400
REJ09B0268-0100
Section 7 ROM