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SH7040 Datasheet, PDF (719/923 Pages) Renesas Technology Corp – Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2) | |||
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Section 22 256kB Flash Memory (F-ZTAT)
22.1 Features
This LSI 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 32 bytes at a time. Block erase (in single-block units) can be
performed. Block erasing can be performed as required on 1 kbyte, 28 kbyte, and 32 kbyte
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, this LSIâs 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.
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