TMC2074-NU SMSC, TMC2074-NU Datasheet - Page 50

• 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

2.10.3 Reception in Standalone Mode
Revision 0.2 (10-23-08)
In Modes 1 and 2, data from the input port is sampled by the internal clock in each port (bit unit) in the
chatter noise filter. Accordingly, when data from the input port is imported into the transmission packet
buffer, data is not secured in byte units or word units. Only bit unit security is available. Neither the A/D
converter nor the counter output can be connected to the input port.
In Mode 3 the chatter noise filter is bypassed and a 15-bit register is connected to the input port. The input
port’s least significant pin (nPSTR) is used in this register clock. When nPISTR starts, data from the input
port (15-bit) is imported into the register and is used as transmission data. Immediately after importing,
data security in the word units (15-bit) is available due to the transmission trigger being activated.
Accordingly, output from the A/D converter or counter can be connected to the input port, and bit 0 of the
transmission data is fixed to 0.
The Standalone mode has the function of exporting the contents of received data packets to the Output
port. To prevent unnecessary updating of output port contents, there are restrictions for the format of
received packets as discussed below:
Received Packet Format Restrictions for Data Port:
When the above requirements are met, as well as normal reception without CRC errors, the word data is
latched to the output latch. Latch output is exported as it is in a normal way as external output. The initial
high-impedance setting after Hardware Reset is maintained at high-impedance until the packet is received
as normal.
Input Port
(PI [15:1])
1)
2)
Packet’s self-address should be (DID = NID);
The contents of the final 5
contents of the final 3
Figure 12 - Transmission Packet Buffer Configuration (Mode 3)
NID [4:0]
(PI [15:8])
nPISTR
(PI [7:1])
rd
and 4
DATASHEET
th
th
and 6
15-bit Register
byte word data.
NST [15:0]
Last 4
th
Page 50
Fixed to 00
byte word data (DATA 1) should be in accordance with the
th
Byte
Page: #S I D
NST15-8
NST7-0
DATA0
DATA1
S I D
D I D
C P
.
.
.
Dual Mode CircLink™ Controller
SMSC TMC2074
Datasheet