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TMC2084-HT Datasheet PDF : 74 Pages
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Standalone Mode CircLinkTM Controller
Datasheet
MAXID
The MAXID defines the maximum node ID of the network and is configured through the network using the
MAXID3 – 0 bits. Configuring the MAXID for the network when the number of nodes is less than the upper
limit that is defined as 7 for PSSL = L and 15 for PSSL = H in the protocol enables tokens to circulate only
among the existing nodes. The allowable MAXID range is 2 through 7 for PSSL = L and 2 through 15 for
PSSL = H. Both 0 and 1 are not allowed. The node ID should be assigned consecutively starting with 1 and
the MAXID should be equal to the number of nodes.
Typically, all nodes should have the same value for MAXID. However, the node that requires MAXID is the
node that has the largest ID number in the network and the remaining nodes can be left to use the default
value: 7 for PSSL = L and 15 for PSSL = H (in this case the maximum ID is assigned to the host node). In
the case where configuration items other than MAXID also can use their corresponding default values,
configuration through the network is not required.
Transmission Rate
Transmission Rate defines a common rate for all nodes. The transmission rate for TMC2072/74 is
configured using either an internal register or an external pin; for TMC2084, it is configured by the value
that is equal to one eighth of the input clock.
TRANSMISSION
RATE
5 Mbps
4 Mbps
2.5 Mbps
2 Mbps
1.25 Mbps
1 Mbps
625 Kbps
500 Kbps
312.5 Kbps
CLOCK
FREQUENCY
40 MHz
32 MHz
20 MHz
16 MHz
10 MHz
8 MHz
5 MHz
4 MHz
2.5 MHz
CLOCK SOURCE
External clock only
External clock or crystal resonator
External clock or crystal resonator
External clock or crystal resonator
External clock or crystal resonator
External clock only
External clock only
External clock only
External clock only
The acceptable frequency of an external crystal resonator is limited to the range of 10 MHz to 32 MHz due
to the limitation of the onchip oscillator’s performance. Please use the external clock module if a frequency
other than the above is needed.
Revision 0.1 (03-31-06)
Page 14
DATASHEET
SMSC TMC2084
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