TMC2074-NU SMSC, TMC2074-NU Datasheet - Page 88

• 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

3.2.11 ECCMD Register: EC Command Register
Revision 0.2 (10-23-08)
ECCMD 7-0 (bits 7 to 0)
This command is unique to CircLink. When the bus width is 8 bits (W16 = 0), access to higher bytes is
invalid; the command accesses the lower bytes. When the bus width is 16 bits (W16 = 1), “00h” should be
specified for the higher bytes. The readable value from this register is the prior write command.
03h: Send command
This command instructs the CircLink to start sending. After issuing the send command, sending is started
upon receipt of token to the node. In continuous send mode (TXM = 1, RTO = 0) or in remote buffer
sending mode, an automatic send operation repeats whenever a node receives the token after the first
send command has been issued.
In Free Format send mode (TXM = 0) or the remote buffer send mode, a send command must be issued
each time in single send mode (TXM = 1, RTO =1).
01h: Sending cancellation command
This command cancels the prior send command . After cancellation, the TA bit is set to 1. If this command
is issued before the node receives the token , cancellation of the send is possible.
It is necessary to confirm tTA bit =1 because the cancellation is actually executed when the token arrives.
In continuous send mode (TXM = 1, RTO = 0) in the remote buffer send mode, continuous send operation
can be stopped. (To restart, a send command is necessary.)
09h: NXTIDERR clear command
This command clears the NXTIDERR bit in COMR1 (Diagnostic register) .
0Ah: WARTERR clear command
This command instructs initialization and start of the warning timer function. In addition, this command
clears the WARTERR bit and the INTSTA register as well as the receive flag in the page that is set to the
remote buffer mode.
0Eh: POR, EXCNAK clear command
This command clears the POR bit in COMR0 (status register) and the EXCNAK bit in COMR1 (diagnostic
register). These bits cannot be cleared individually.
16h: RECON clear command
This command clears the RECON bit in COMR0 (status register).
1Eh: Concurrent operation of POR, EXCNAK clear and RECON clear command
ECCMD
15-8
7-0
bit
name
--------
ECCMD7-0
DATASHEET
init. value description
00h
0
Page 88
reserved (all "0")
EC Command
Dual Mode CircLink™ Controller
(Read/Write)
address:16h
SMSC TMC2074
Datasheet