13

4386A–8051–10/04

Example

Program Configuration

Information

The flow described below allows the user to program Configuration Information regard-

ing the bootloader functionality.

The Boot Process Configuration:

BSB

SBV

Fuse bits (BLJB and X2 bits) (see Section “Mapping and Default Value of Hardware

Security Byte”)

SSB

EB

Requests from Host

Note:

1. The field “Load Offset” is not used

2. To program the BLJB and X2 bit the “bit value” is 00h or 01h.

Answers from Bootloader

The bootloader answers with:

•

‘.’ & ‘CR’ & ’LF’ when the value is programmed

•

‘X’ & ‘CR’ & ‘LF’ if the checksum is wrong

•

‘P’ & ‘CR’ & ‘LF’ if the Security is set

HOST

: 05 0000 04 0000 0020 00 D7

BOOTLOADER

: 05 0000 04 0000 0020 00 D7

BOOTLOADER

0000=-----data------ CR LF

(16 data)

BOOTLOADER

0010=-----data------ CR LF

(16 data)

BOOTLOADER

0020=data CR LF

( 1 data)

Display data from address 0000h to 0020h

Command Name

Record

Type

Load

Offset

Record

Length

Data[0]

Data[1]

Data[2]

Erase SBV & BSB

03h

x

02h

04h

00h

-

Program SSB level1

02h

05h

00h

-

Program SSB level2

01h

-

Program BSB

03h

06h

00h

value

Program SBV

01h

Program EB

06h

Program bit BLJB

03h

0Ah

04h

bit value

Program bit X2

08h