TMC2084-HT SMSC, TMC2084-HT Datasheet - Page 25

• Manufacturer Part Number: TMC2084-HT
• Description: IC CTRLR CIRCLINK TM 48-TQFP
• Manufacturer: SMSC
• Series: CircLink™r

Specifications of TMC2084-HT

• Controller Type: I/O Controller
• Interface: Transceiver
• Voltage - Supply: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Other names: 638-1025

Standalone Mode CircLink
Datasheet
NOTE:
SMSC TMC2084
nTXDONE
nPISTR1/2
By the external trigger:
The rising edge on the external trigger input pin (nPISTR1 or nPISTR2) latches the input data and
generates the trigger. The INPUT DATA packet is then transmitted after receiving the token.
Either nPISTR1 or nPISTR2 is selected as the external trigger input pin depending on the I/O port direction
configured by pins PGS2 - 0. If all of ports are configured as OUTPUT PORTs by the configuration feature
for I/O port direction, then this external trigger cannot be used.
When the NST value latch is used, both the NST value and input data are latched simultaneously and the
latched NST value is transmitted. When the NST value latch is not used, the last NST value is transmitted
regardless to latching the input data.
(Both the input data and NST value latches are cleared to zero by hardware at initialization.)
Receiving the token allows the actual transmission of packets. Thus, the delay time from the trigger to the
actual transmission can vary. If two consecutive external triggers are inputted, it can not be determined
which trigger caused the data transmission since it depends on when the token was received.
Using nTXDONE (transmit completion flag) of the FLAG OUTPUT allows an easy handshake.
Whenever the token is received:
With this condition, the trigger is always generated. The INPUT DATA packet is transmitted whenever own
token is received.
Receiving COMMAND packet:
A single transmit trigger is generated whenever either the START TRANSMIT or INITIALIZE OUTPUT
PORT command that is destined for this node or broadcasted is received. The INPUT DATA packet is then
transmitted upon receiving the token (The transmit trigger caused by the INITIALIZE OUTPUT PORT
command is valid after receiving the START TRANSMIT command).
Note that the Return Setting and SOFTWARE RESET commands do not cause any transmit trigger. For
detail information on each command, see section 2.4 COMMAND packet.
A single transmit trigger is generated each time the START TRANSMIT command is received regardless
of the configuration for the transmit trigger. Additionally, a single transmit trigger is generated at the time
the INITIALIZE OUTPUT PORT command is received after receiving the START TRANSMIT command.
TM
Controller
DATASHEET
Trigger input is inhibited
during transmission process
Page 25
Completion of transmission
Revision 0.2 (10-23-08)