CONTROLINK86 SMSC, CONTROLINK86 Datasheet - Page 57

• Manufacturer Part Number: CONTROLINK86
• Description: Development Software Embedded Networking Software
• Manufacturer: SMSC

Specifications of CONTROLINK86

• Tool Function: Compiler
• Tool Type: Compiler
• Processor Series: 80x86
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ControLink86 Realtime Networking Software
6.NETWORK SPEED
ControLink86 is primarily designed to operate with the default network speed and timeout values for the
COM2002x ULANC controllers. The network speed and timeout concepts are explained in the
COM2002x ULANC Data Sheets. The default values are those which are the original values for the
ARCNET Local Area Network Standard: ATA/ANSI 878.1.
COM2002x permits the operation of the physical medium at the following speeds / timeout / timer
selections. The network speed is a function of the following factors:
The above circumstances influence the behavior of the ARCNET network core, and more specifically its
Response Timer, Idle Timer and Reconfiguration Timer.
The table above summarizes the values of the timers for each network speed. The shaded field is the
default network speed
ET2
1
1
0
0
•
•
•
Crystal oscillator value (20MHz or 40MHz)
Setting of the Clock Prescaler bits CKP3, CKP2, CKP1 which divide the oscillator frequency and
yield the effective network speed (baud rate)
Setting of the Extended Timeout bits ET1, ET2 and separately ET3
ET1
1
0
1
0
Divisor
128
128
128
128
16
32
64
16
32
64
16
32
64
16
32
64
8
8
8
8
*
*
*
*
Speed
156.25
156.25
156.25
156.25
312.5
312.5
312.5
312.5
1.25
1.25
1.25
1.25
625
625
625
625
2.5
2.5
2.5
2.5
5
5
5
5
mbps
mbps
mbps
mbps
mbps
mbps
mbps
mbps
mbps
mbps
mbps
mbps
kbps
kbps
kbps
kbps
kbps
kbps
kbps
kbps
kbps
kbps
kbps
kbps
57
Response Timer
[us]
19097.6
1193.6
1193.6
2387.2
4774.4
1193.6
2387.2
4774.4
9548.8
1193.6
2387.2
4774.4
9548.8
37.35
149.4
298.4
596.8
298.4
596.8
298.4
596.8
596.8
74.7
74.7
Idle Timer
[us]
10496
10496
20992
1312
1312
2624
5248
1312
2624
5248
1312
2624
5248
164
328
656
328
656
328
656
656
41
82
82
Reconfiguration
Timer [ms]
13440
13440
26880
13440
26880
13440
26880
1680
3360
6920
1680
3360
6920
1680
3360
6920
1680
3360
6920
420
840
840
840
840