TMC2072-MT SMSC, TMC2072-MT Datasheet - Page 41

• 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
2.9.1
SMSC TMC2072
CKP>=011
Temporary Receive and Direct Receive
Packets received are stored in the pages partitioned by the received source ID (received SID). There are
two methods for storing packets: storing after error checking through a temporary buffer (#00), and storing
directly. The decision of which process is used is automatically selected in CircLink based on the
combination of page size and communication speed prescaler setting. The smaller the page size or the
larger the division ratio of the transfer rate prescaler, the more data packets will be received through the
temporary buffer.
In the table above, “ % ” indicates ‘Temporary Relay Reception is not available in the default setting.
However, by setting the FARB Bit = 1 in register, Setup 2 temporary relay reception is available. The FARB
Bit = 1 setting is possible when the FARB bit default is 0 and only when the input clock is below 20 MHz.
When the clock exceeds 20 MHz, it should not be set to 1. Also, FARB Bit renewal must be carried out
during software reset.
In temporary buffer receive mode, the packet data containing any errors is left at page 00 if the receive
terminates abnormally (CRC error, etc.) the copy to "SID page" corresponding to the received source ID
(Receive SID), is not executed (the received data is discarded).
In direct receive mode, the packet data containing errors is left at “SID page” even if the receive terminates
abnormally (CRC error, etc.).
Regardless of whether the receive is done through temporary buffer or direct receive, the RXF# flag upon
abnormal termination of receive is set to 0 (not completed). It does not matter which receive process is
being used because free format mode assumes that the receive is always checked with the RXF# flag. *
On the contrary, the receive process is important in the remote buffer receive mode with direct receive. *
In the worst case, if SID is corrupted in the received packet, the packet data may be written to the wrong
page.
CKP[2:0]
000
001
010
Bit Rate : Input clock
1:64 over
1:16
1:32
1:8
Prescale
% :
O :
X :
DATASHEET
Receive through temporary buffer available
Receive through temporary buffer not available
Receive through temporary buffer available with condition
1.25 Mbps : 20 MHz Xtal
2.5 Mbps : 20 MHz Xtal
625 kbps : 20 MHz Xtal
Communication Speed
Omission
Page 41
11:32B
O
O
O
O
Page Size Setting ? PS[1:0]
see paragraph below.
10:64B
O
O
O
O
01:128B 00:256B
%
O
O
O
Revision 0.1 (06-07-07)
%
O
O
X
1
2.