COM20022I3V-HD SMSC, COM20022I3V-HD Datasheet - Page 10

• Manufacturer Part Number: COM20022I3V-HD
• Description: Network Controller & Processor ICs ARCNET Contrllr
• Manufacturer: SMSC

Specifications of COM20022I3V-HD

• Data Rate: 10 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Revision 02-27-06
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* Reconfig timer is programmable via setup2 register bits 1, 0.
Note - All time values are valid for 10Mbps.
ID refers to the identification number of the ID assigned to this node.
NID refers to the next identification number that receives the token
after this ID passes it.
SID refers to the source identification.
DID refers to the destination identification.
SOH refers to the start of header character; preceeds all data packets.
N
Timer (210 mS)*
Reconfiguration
N
Broadcast?
Start
Was Packet
Broadcast?
TA?
Packet
Send
for 18.7
Activity
ACK?
us?
No
N
N
Y
Reconfigure
Timer has
Timed Out
Y
Y
Y
N
Y
Set TMA
Transmit
Transmit
Set TA
NAK
ACK
Y
Figure 3.1
to Transmit to
Reconfigure
RAM Buffer
Set NID=ID
Write ID to
Invitation
Read Node ID
Power On
this ID?
Y
Send
Burst
Increment
DATASHEET
Free Buffer
RI?
Transmit
Enquiry
NID
Y
Y
- COM20022I 3V Operation
ACK?
N
Y
Free Buffer
Enquiry to
N
N
this ID?
NAK?
Y
N
Page 10
for 18.7
Activity
for 18.7
Activity
No
us?
N
us?
No
1
N
10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Board RAM
Y
Set TA
N
Pass the
Y
Token
RI?
SEND ACK
Y
Write Buffer
with Packet
Write SID
to Buffer
N
LENGTH
DID
=0?
N
Y
Y
=ID?
CRC
OK?
=ID?
OK?
1
SOH?
DID
=0?
DID
DID
N
Y
Y
N
Y
Y
N
N
N
N
Broadcast
Enabled?
Y
Set RI
N
N
Start Timer:
Set NID=ID
T=(255-ID)
No Activity
x 36.5 us
On Line?
Activity
for 20.5
T=0?
uS?
SMSC COM20022I 3V
Y
Y
N
Y
N
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