H8SSLASH2225 datasheet(802/1071 Pages) RENESAS

802 / 1071 page

Section 20 Flash Memory (F-ZTAT Version)

Rev. 5.00 Aug 08, 2006 page 716 of 982

REJ09B0054-0500

• Programmer mode

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

as well as in on-board programming mode.

• Emulation function for flash memory in RAM

The real-time emulation for programming of flash memory is possible by overlapping the flash

memory to a part of RAM.

Bus interface/controller

H8S/2239

H8S/2258

H8S/2238B

H8S/2238R

H8S/2227

Operating

mode

FLMCR2

Internal address bus

Internal data bus (16 bits)

FWE pin

Mode pin

EBR1

EBR2

RAMER

FLMCR1

Flash memory control register 1

Flash memory control register 2

Erase block register 1

Erase block register 2

RAM emulation register

Legend:

FLMCR1:

FLMCR2:

EBR1:

EBR2:

RAMER:

FLPWCR: Flash memory power control register

FLPWCR

Flash memory

: 384 kbytes

: 256 kbytes

: 128 kbytes

Figure 20.1 Block Diagram of Flash Memory

20.2

Mode Transitions

When the mode pins and the FWE pin are set in the reset state and a reset-start is executed, this

LSI enters an operating mode as shown in figure 20.2. In user mode, flash memory can be read but

not programmed or erased.

The boot, user program and programmer modes are provided as modes to write and erase the flash

memory.

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