Rainbow Electronics T89C5121 - Manual (Page 70)

70
A/T8xC5121
4164G–SCR–07/06
• 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
05h
03h
00h
01h
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
00h
Read SSB
Read Bootloader Version
06h Direct Load of Baud Rate HSB LSB Not implemented