SH7046 Datasheet, PDF (503/611 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7046 Series

Section 18 Flash Memory (F-ZTAT Version)
Section 18 Flash Memory (F-ZTAT Version)
The features of the flash memory in the flash memory version are summarized below.
The block diagram of the flash memory is shown in figure 18.1.
18.1 Features
• Size: 256 kbytes
• 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: 64 kbytes × 3 blocks, 32 kbytes × 1
block, and 4 kbytes × 8 blocks. To erase the entire flash memory, each block must be
erased in turn.
• Reprogramming capability
 For details, see section 22, Electrical Characteristics.
• Two on-board programming modes
 Boot mode
 User program mode
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 on board.
• PROM 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
 With 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/verifying.
ROM3250A_000020020700
Rev. 4.00 Dec 05, 2005 page 459 of 564
REJ09B0270-0400