Datasheet

Section 7 ROM
ROM3323A_000020030600 Rev. 2.00 Sep. 23, 2005 Page 79 of 444
REJ09B0068-0200
Section 7 ROM
The features of the 32-kbyte (4 kbytes are used for E7 or E8 control program area) flash memory
built into the flash memory (F-ZTAT) 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. 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.