TMC2072-MT SMSC, TMC2072-MT Datasheet - Page 51

• 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
NOTE:
SMSC TMC2072
CKP[2:0] Communication Speed CM --> CS Time Defference Communication Speed CM --> CS Time Defference
000
001
010
011
100
101
CircLink has an offset value built-in to absorb the phase error depending on communication speed.
Moreover, the offset value can be manually set at the higher threshold of the CARRY register.
Only automatic setup is available in the condition of NSTPRE2 = L(0).
OFSMOD (CARRY register: bit 15)
0: Automatic offset (default) 1: Manual offset
NSTOFS4 -0 (CARRY register: bit 12 to 8)
The offset value is selected among 0 to 31.
The actual offset time is “NST resolution x NSTOFS4-0”.
Unlock flag
Synchronization between the NST unlock flag in the CM node and the NST in any other node is informed
by NSTUNLOC signal in the INTSTA register. This flag can be used as an interrupt source.
0: Synchronous lock state , 1: Synchronous unlock state (default)
*About approval condition for Synchronous lock /unlock state
- Unlock to lock state (NSTUNLOC=0)
- Lock to unlock state (NSTUNLOC=1)
A possible cause of unlock status not being cancelled is that the CM node’s NST pre-scalar setting is not
in synchronized? A possible cause of sometimes falling into unlock status is that the CM node’s
transmission frequency is low.
In the case of the CM node, the flag becomes 0 in a steady state (synchronous lock status) for no apparent
reason. As the initial settings in this case depends on the function modes, listed below.
Notes : "CM --> CS Time Defference" does NOT include Propagation Delay of cable.
62.5K (78.125K) bps
125K (156.25K) bps
250K (312.5K) bps
1.0M (1.25M) bps
500K (625K) bps
2.0M (2.5M) bps
The difference between own NST and NST from CM node is within +/-2. And NST from CM node
must be received three times or more continuously, and all of those differences must be within +/-2.
The difference between own NST and NST from CM node is not within +/-2. Or NST from CM node
must be received three times or more continuously, and all of those differences are not within +/-2.
16MHz(20MHz) XTAL
DATASHEET
220 (176) us
440 (352) us
880 (704) us
27.5 (22) us
110 (88) us
55 (44) us
Page 51
125K (156.25K) bps
250K (312.5K) bps
1.0M (1.25M) bps
500K (625K) bps
4.0M (5.0M) bps
2.0M (2.5M) bps
32MHz(40MHz) XTAL
Revision 0.1 (06-07-07)
220 (176) us
440 (352) us
13.8 (11) us
27.5 (22) us
110 (88) us
55 (44) us