t89c51rd2-slscl ATMEL Corporation, t89c51rd2-slscl Datasheet - Page 72
t89c51rd2-slscl
Manufacturer Part Number
t89c51rd2-slscl
Description
0 To 40 Mhz Flash Programmable 8-bit Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.T89C51RD2-SLSCL.pdf
(104 pages)
- Current page: 72 of 104
- Download datasheet (2Mb)
Example
Read Function
Description
Figure 30. Read Flow
Example
72
T89C51RD2
COMMAND FINISHED
Wait Value of Data
Send Read Command
OR
Host
OR
COMMAND ABORTED
COMMAND ABORTED
Wait Checksum Error
Wait Security Error
This flow is similar for the following frames:
•
•
Read function (read SBV)
Atmel Read function (read Bootloader version)
Display data from address 0000h to 0020h
HOST
BOOTLOADER
HOST
BOOTLOADER
BOOTLOADER
BOOTLOADER
BOOTLOADER
HOST
BOOTLOADER
Reading Frame
EOF Frame/Atmel Frame (only reading Atmel Frame)
’value’ & ’.’ & CR & LF
’X’ & twice (CR & LF)
Read Command
’L’ & CR & LF
: 02 0000 05 07 02 F0
: 02 0000 05 07 02 F0 Value . CR LF
: 02 0000 01 02 00 FB
: 02 0000 01 02 00 FB Value . CR LF
0000=-----data------ CR LF
0010=-----data------ CR LF
0020=data CR LF
: 05 0000 04 0000 0020 00 D7
: 05 0000 04 0000 0020 00 D7
Send Checksum error
Send Security error
Bootloader
Wait Read Command
(16 data)
(16 data)
( 1 data)
RD_WR_SECURITY
Send Data Read
Checksum error
Read Value
4243G–8051–05/03
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