Renesas H8S/2100 Series Hardware Manual page 711

6-bit single-chip microcomputer

Hide thumbs Also See for H8S/2100 Series:

Table of Contents

FSI Command Usage Example 1 (SPI Flash Memory Erasure)

The FSI commands enable the execution of several instructions for the SPI flash memory. Figure

21.15 shows an example of executing the SPI flash memory erasure instruction.

FSIHBAR: H'231F

FSISR: H'00 (1 MB)

CMDHBAR: H'EFFF

In flash memory erasure, the SPI flash memory address is stored in FSIAR and an erasure

instruction for the SPI flash memory is executed by an SPI command. The flash memory address

storage in FSIAR is performed by writing data to the sector or block address to be erased via the

host. To distinguish the SPI flash memory erasure from the SPI flash memory programming, the

erasure is performed in the following sequence using the FSIDMYE.

Host address

Host address

Host address

Figure 21.15 SPI Flash Memory Erasure (Example)

FSICMDR[7:0]

Command data (H'10)

FSICMDR[7:0]

Command data (H'11)

Rev. 1.00 May 09, 2008 Page 685 of 954

Section 21 FSI Interface

Interrupt requests

Interrupt requests

REJ09B0462-0100