AT89C51CC03 Просмотр технического описания (PDF) - Unspecified

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AT89C51CC03

CAN Microcontrollers

Unspecified 

AT89C51CC03 CAN Bootloader

Figure 3. Identifier Remapping

CAN Identifiers

7FFh

[CRIS]0h

CAN ISP identifiers

ID_error

ID_read_command

ID_write_command

ID_display_data

ID_prog_data

ID_prog_start

ID_select_node

Group of 7CAN messages

Used to manage CAN ISP

000h

Communication

Initialization

The communication with a device (CAN node) must be opened prior to initiate any ISP

communication.

To open communication with the device, the Host sends a “connecting” CAN message

(Id_select_node) with the node number (NNB) passed in parameter.

If the node number passed is equal to FFh then the CAN bootloader accepts the communication

(Figure 4).

Otherwise the node number passed in parameter must be equal to the local Node Number (Fig-

ure 5).

Figure 4. First Connection

Host

Interface board between PC

and CAN network

NNB = FFh (default value)

Node 1

Figure 5. On Network Connection

NNB = 00h

Host

Interface board between PC

and CAN network

Node 0

NNB = 01h

Node 1 NNB = 03h

Node 3

NNB = n

Node n

4251B–CAN–03/08

Before opening a new communication with another device, the current device communication

must be closed with its connecting CAN message (Id_select_node).

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