TMC2074-NU SMSC, TMC2074-NU Datasheet - Page 79

• Manufacturer Part Number: TMC2074-NU
• Description: IC CTRL CIRC 128VTQFP PERIPH MOD
• Manufacturer: SMSC
• Series: CircLink™r

Specifications of TMC2074-NU

• 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: 128-TQFP, 128-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1024

Dual Mode CircLink™ Controller
Datasheet
SMSC TMC2074
ET1, ET2 (bits 4 and 3)
These bits set the timeout time of the response and idle timers. The following timeout times are the values
applicable when the transfer rate is 2.5 Mbps (the values become half at 5 Mbps).
ET2,ET1 = 0,0 Response Timer = 1193.6 uS Idle Timer = 1312 uS MAX Distances = 118.4 km
ET2,ET1 = 0,1 Response Timer = 596.8 uS Idle Timer = 656 uS MAX Distances = 57.6 km
ET2,ET1 = 1,0 Response Timer = 298.4 uS Idle Timer = 328 uS MAX Distances = 28.8 km
ET2,ET1 = 1,1 Response Timer = 74.7 uS Idle Timer = 82 uS MAX Distances = 6.4 km
These timeout times must be identical in every node on the network. Refer to the description of the
RCNTM1, 0 bits in the SETUP2 register.
BACKPLAN (bit 2)
This bit selects back plane mode and normal (dipulse) mode; setting 1 to the bit selects back plane mode
and setting 0 selects normal (dipulse) mode. Back plane mode is usually used (default).
DATASHEET
Page 79
Revision 0.2 (10-23-08)