SH7052 datasheet(713/919 Pages) RENESAS

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Section 20 ROM (SH7052F/SH7053F)

20.1

Features

The SH7052F/SH7053F has 256 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 128 bytes at a time. Block erase (in single-block units) can

be performed. To erase the entire flash memory, individual blocks must be erased in turn.

Block erasing can be performed as required on 4 kB, 32 kB, and 64 kB blocks.

• Programming/erase times

The flash memory programming time is 7 ms (typ.) for simultaneous 128-byte programming,

equivalent to 55 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 SH7052F/SH7053F’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.

SH7052 Datasheet(PDF) 713 Page - Renesas Technology Corp