TMC2074-NE SMSC, TMC2074-NE Datasheet - Page 23

• 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

Dual Mode CircLink™ Controller
Datasheet
1.6.16 NST Carry Output Digit Select
1.6.17 CMI Bypass Specification
1.6.18 HUB Function ON/OFF
1.6.19 Optical Transceiver Mode
SMSC TMC2074
CKP2-0
000
001
010
011
100
101
110
111
(NSTC[3], nEHWR/NSTC[2], nEHRD/NSTC[1], NSTC[0]: Pin)
These pins are equivalent to the same-symbol signal NSTC[3:0] (bit 7-4) of the carry register in
Standalone mode. The output timing of external pulse nNSTCOUT is specified as an NST digit position.
For the functions using Peripheral mode, refer to sections 1.6.3 and 1.6.4.
(nCMIBYP: Pin)
Selects bypassing the CMI code/encoding. nCMIBYP = L bypasses the CMI coding/decoding circuit so that
encoding is RZ form signal interface, equivalent to the ARCNET back plane mode.
(nHUBON: Pin)
Selects ON/OFF ; nHUBON=H selects HUB function OFF, nHUBON=L selects HUB function ON and
enables port 2 (RXIN2 and TXEN2) ( in nHUBON = H, RXIN2 should be fixed to High).
Refer to section 2.14 - HUB Function for the detailed operations.
(nOPMD: Pin)
Selects the output mode of the sending-enable; nOPMD = H makes the optical transceiver mode
unavailable and allows the TXEN and TXEN2 output pins to function as “sending-enable”. Setting nOPMD
= L allows TXEN and TXEN2 output pins to function as “sending-enable and sending pulse” to be able to
be directly connected to the TTL input pin of the optical transceiver.
Prescale
reserved
reserved
128
256
16
32
64
8
40MHz XTAL
156.25Kbps
312.5Kbps
1.25Mbps
625Kbps
reserved
reserved
2.5Mbps
5Mbps
DATASHEET
Page 23
20MHz XTAL
156.25Kbps
78.125Kbps
312.5Kbps
1.25Mbps
625Kbps
reserved
reserved
2.5Mbps
Communication Speed
32MHz XTAL
500Kbps
250Kbps
125Kbps
reserved
reserved
4Mbps
2Mbps
1Mbps
Revision 0.2 (10-23-08)
16MHz XTAL
62.5Kbps
500Kbps
250Kbps
125Kbps
reserved
reserved
2Mbps
1Mbps