TMC2072-MT SMSC, TMC2072-MT Datasheet - Page 39

• Manufacturer Part Number: TMC2072-MT
• Description: IC CTRLR CIRC 100-TQFP DUAL MODE
• Manufacturer: SMSC
• Series: CircLink™r

Specifications of TMC2072-MT

• Controller Type: I/O Controller
• Interface: Transceiver
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 40mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1023

Peripheral Mode CircLink™ Controller
Datasheet
2.8.2
NOTE: When DID is set to 00h it becomes the broadcast packet.
2.9
SMSC TMC2072
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1 W rite A d d re ss
2 W rite D a ta
3 T ra n sm it C o m m a n d
4 W rite D a ta
4 W rite D a ta
4 W rite D a ta
5 re p e a te d ly
TX Control from CPU in Remote Buffer Mode
(MODE REGISTER: TXM = 1)
CircLink can be treated as a simple data buffer so that the system CPU can write data to the CircLink at
any time.
(*1)
If the RTO bit is 0 in the mode register, CircLink continues sending packets with a single TX CMD. The TA
bit that represents TX end, continues to be 0 unless RTO is set to 1 (constant TX status).
If the RTO bit is 1, the TA bit returns to 1 after each packet is transmitted, as in Free Format mode. TX
CMD must be issued every time but this does not significantly increase traffic on the network, making it
suitable for applications such as handling sensor information that remains fairly constant.
Receive in Peripheral Mode
CircLink receives all packet data on the network. After receiving a packet without any errors, CircLink
stores the packets in the relevant page in packet RAM according to the source ID (SID) included in the
packet. Receiving the data packet addressed to the node has four steps: Receiving FBE → Sending ACK
→ Receiving PACKET→ Sending ACK. For receiving a data packet addressed to another node in the
network, the packet is stored in the relevant page without sending an ACK.
As described above, CircLink constantly receives packets, with one exception: It abandons the received
packets when the receive mode of the corresponding page is Free Format mode and the receive flag is set
C P U S id e
( ): N o t d o n e fo r b ro a d c a sts
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DATASHEET
e a ch tim e o f th e re c e ive
A u to m a tic tra n sm it a t
Page 39
K e e p o f T A = 0 (*1 )
S ta rt T ra n sm it
E n d T ra n sm it
T M C 2 0 7 4 /7 2
o f s e lf T o k e n
re p e a te d ly
T A = 1 -> 0
(N ID = n )
(F B E )
P A C
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L A N S id e
T o k e n [D ID = n ]
(A C K )
(A C K )
T o k e n [D ID = n + 1 ]
Revision 0.1 (06-07-07)