Datasheet

4266C–CAN–03/08

AT89C51CC03 UART Bootloader

Command Data Stream Protocol

All commands are sent using the same flow. Each frame sent by the host is echoed by the

bootloader.

Figure 3. Command Flow

38400 - - OK OK OK OK OK OK OK

57600 - - OK - OK OK OK OK OK

115200 - - OK - OK - - - -

Frequency

(MHz)

Baudrate

(kHz) 8 10 11.0592 12 14.746 16 20 24 26.6

Bootloader

":"

Sends first character of the

Frame

If (not received ":")

Sends frame (made of 2 ASCII

Gets frame, and sends back echo

for each received Byte

Host

Else

":"

Sends echo and start

reception

characters per Byte)

Echo analysis