SH7014 datasheet(523/754 Pages) RENESAS

523 / 754 page

18. 128 kB Flash Memory (F-ZTAT)

Rev.5.00 Sep. 27, 2007 Page 489 of 716

REJ09B0398-0500

Section 18 128 kB Flash Memory (F-ZTAT)

18.1

Features

The SH7017 has 128 kbytes of on-chip flash memory. The features of the flash memory are

summarized below.

• Four flash memory operating modes

⎯ Program mode

⎯ Erase mode

⎯ Program-verify mode

⎯ Erase-verify mode

• Programming/erase methods

The flash memory is programmed 32 bytes at a time. Block erase (in single-block units) can be

performed. Erasing the entire memory requires erasure of each block in turn. Block erasing can

be performed as required on 1 kB, 28 kB, and 32 kB blocks.

• Programming/erase times

The flash memory programming time is 10 ms (typ.) for simultaneous 32-byte programming,

equivalent to 300

μs (typ.) per byte, and the erase time is 100 ms (typ.) per block.

• Reprogramming capability

The flash memory can be reprogrammed up to 100 times.

• On-board programming modes

There are two modes in which flash memory can be programmed/erased/verified on-board:

⎯ Boot mode

⎯ User program mode

• Automatic bit rate adjustment

With data transfer in boot mode, the SH7017's bit rate can be automatically adjusted to match

the transfer bit rate of the host.

• Flash memory emulation in RAM

Flash memory programming can be emulated in real time by overlapping a part of RAM onto

flash memory.

• Protect modes

There are two protect modes, hardware and software, which allow protected status to be

designated for flash memory program/erase/verify operations

• Programmer mode

Flash memory can be programmed/erased in programmer mode, using a PROM programmer,

as well as in on-board programming mode.

SH7014 Datasheet(PDF) 523 Page - Renesas Technology Corp