TMC2074-NE SMSC, TMC2074-NE Datasheet - Page 38

• Manufacturer Part Number: TMC2074-NE
• Description: Network Controller & Processor ICs Standalone Mode CircLink Cntlr
• Manufacturer: SMSC

Specifications of TMC2074-NE

• Product: Controller Area Network (CAN)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.8
2.8.1
NOTE:
Revision 0.2 (10-23-08)
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Sending in Peripheral Mode
To send data using CircLink, it is necessary to write data being transmitted in the packet buffer regardless
of the communication mode. For TX, the page corresponding to its node ID in the packet buffer is assigned
as the TX buffer. The CPU writes TX data on this page.
Example of Sending Control from CPU in Free Format Mode
(MODE REGISTER: TXM = 0)
The CPU manages all communication sequences such as "Packet preparation → Issuing TX CMD →
Handling interrupt after the end of TX".
When DID set to 00h, it becomes the broadcast packet.
1 Write to Packet
2 Transmit Command
3 Release Interrupt mask
4 Read Status
5 Interrupt Mask
CPU Side
( ): Not executed in the case of broadcast transmit.
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DATASHEET
Interrupt occurre
Transmit Start
Page 38
Transmit End
TMC2074/72
TA = 1 --> 0
TA = 0 --> 1
(NID=n)
(FBE)
PAC
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LAN Side
Token [DID=n]
(ACK)
(ACK)
Token [DID=n+1]
Dual Mode CircLink™ Controller
SMSC TMC2074
Datasheet