H8SXSLASH1663 datasheet(970/1158 Pages) RENESAS

Part #	H8SX/1663

Description	Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

PDF	1158 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 21 Flash Memory (0.18-

µm F-ZTAT Version)

Rev.1.00 Jun. 07, 2006 Page 918 of 1102

REJ09B0294-0100

(3) Erasing Procedure in User Program Mode

The procedures for download of the on-chip program, initialization, and erasing are shown in

figure 21.14.

Set FKEY to H'A5

Set SCO to 1 after initializing

VBR and execute download

DPFR

= 0?

Yes

Download error processing

Set the FPEFEQ

parameter

Yes

End erasing

procedure program

FPFR

= 0 ?

Initialization error processing

Disable interrupts and

bus master operation

other than CPU

Clear FKEY to 0

Set FEBS parameter

Yes

FPFR

= 1 ?

Clear FKEY and erasing

error processing

Yes

Required block

erasing is

completed?

Set FKEY to H'5A

Clear FKEY to 0

Initialization

JSR FTDAR setting

+ 32

Erasing

JSR FTDAR setting

+ 16

Select on-chip program

to be downloaded and

specify download

destination by FTDAR

Start erasing procedure

program

Figure 21.14 Erasing Procedure in User Program Mode

H8SX/1663 Datasheet(PDF) 970 Page - Renesas Technology Corp

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