com20020-5 Standard Microsystems Corp., com20020-5 Datasheet - Page 7
com20020-5
Manufacturer Part Number
com20020-5
Description
Com20020-5 Ulanc Universal Local Area Network Controller With 2k X 8 On-board Ram
Manufacturer
Standard Microsystems Corp.
Datasheet
1.COM20020-5.pdf
(58 pages)
- Current page: 7 of 58
- Download datasheet (253Kb)
-
-
-
-
-
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
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
Reconfiguration
Timer (420 mS)
N
Broadcast?
Start
Was Packet
Broadcast?
TA?
Packet
Send
Activity
ACK?
37.35
us?
No
for
Y
N
N
Reconfigure
Timer has
Timed Out
Y
Y
Y
N
Y
Set TMA
Transmit
Transmit
Set TA
NAK
ACK
Y
FIGURE 1 - COM20020-5 OPERATION
to Transmit to
Reconfigure
RAM Buffer
Write ID to
Set NID=ID
Invitation
Read Node ID
Power On
this ID?
Y
Send
Burst
Increment
Free Buffer
RI?
Transmit
Enquiry
NID
Y
Y
ACK?
N
Y
Free Buffer
Enquiry to
N
N
this ID?
NAK?
Y
N
Activity
37.35
Activity
37.35
No
for
us?
us?
No
N
for
7
1
N
Y
Set TA
N
Pass the
Y
Token
RI?
SEND ACK
Write Buffer
with Packet
Y
LENGTH
Write SID
to Buffer
N
DID
=0?
CRC
N
=ID?
Y
OK?
Y
=ID?
OK?
SOH?
DID
DID
=0?
1
DID
N
Y
Y
N
Y
Y
N
N
N
N
Broadcast
Enabled?
Y
Set RI
N
N
Start Timer:
T=(255-ID)
Set NID=ID
No Activity
x 73 us
On Line?
Activity
for 41
T=0?
uS?
Y
Y
N
Y
N
Related parts for com20020-5
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Interface, Integrated USB2.0 Compatible 3-Port Hub
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Lan91c100fd Rev. B Feast Fast Ethernet Controller With Full Duplex Capability
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Feast ? Ast Ethernet Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Com20022i 10 Mbps Arcnet Ansi 878.1 Controller With 2k X 8 On-chip Ram
Manufacturer:
Standard Microsystems Corp.
Part Number:
Description:
Lpc47n207 Lpc Super I/o Irda Hot Docking Chip With Uart Data Brief
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Advanced I/o With X-bus Interface
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Fdc37m707 Enhanced Super I/o Controller With Wake-up Features
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Twenty Pin Uart Tpuart Corporation
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Enhanced Small Device Interface Controller
Manufacturer:
Standard Microsystems Corp.
Part Number:
Description:
Rpm-based Pwm Fan Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Rpm-based Pwm Fan Controller
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
Emc1001 1.5?c Smbus Temperature Sensor In Miniature Sot-23
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Triple Temperature Sensor With Beta Compensation And Hotter Of Two Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Multiple Temperature Sensor With Beta Compensation And Hottest Of Thermal Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet:
Part Number:
Description:
1 Degree C Triple Temperature Sensor With Resistance Error Correction & Hotter Of Two Zones
Manufacturer:
Standard Microsystems Corp.
Datasheet: