T83C5121 datasheet(68/110 Pages) ATMEL

68 / 110 page

T8xC5121

4164E–SCR–02/04

•

Record Type:

–

Record Type specifies the command type. This field is used to interpret the

remaining information within the frame. The encoding for all the current

record types are described in Table 51.

•

Data/Info:

–

Data/Info is a 64 bytes length field. It consists of 64 bytes encoded as pairs

of hexadecimal digits. The meaning of data depends on the Record Type.

•

Checksum:

–

The two’s complement of the 8-bit bytes that result from converting each pair

of ASCII hexadecimal digits to one byte of binary, and including the Reclen

field to and including the last byte of the Data/Info field. Therefore, the sum

of all the ASCII pairs in a record after converting to binary, from the Reclen

field to and including the Checksum field, is zero.

Notes:

1. A data byte is represented by two ASCII characters.

2. When the field Load Offset is not used, it should be coded as 2 bytes (00h 00h).

Command Description

Table 51. Frame Description

Command

Command Name

data[0]

data[1]

Command Effect

00h

Program Data

Program 64 Data Bytes

01h

End Of File

End of File

03h

Write Function

07h

05h

03h

00h

01h

Full Chip Erase

Program SSB level1

Program SSB level2

LJMP(data[2],data[3])

(LJMP0000h)

04h

Display Function

Data[0:1] = start address

Data [2:3] = end address

Data[4] = 00h -> Display

data

Data[4] = 01h -> Blank

check

Data[4] = 03h -> Display

CRAM

Display Data

05h

Read Function

07h

0Fh

00h

Read SSB

Read Bootloader Version

06h

Direct Load of Baud Rate

HSB

LSB

Not implemented

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