EVB-20022 SMSC Corporation, EVB-20022 Datasheet - Page 8

• Manufacturer Part Number: EVB-20022
• Description: Industrial ARCNET AT Adapter Card
• Manufacturer: SMSC Corporation

Note:
Note:
JUMPER LIST
SMSC UG - EVB-20022
Make sure JP8, JP9, JP11 and JP12 are unconnected.
If socketed COM20022 (SKT1) is being utilized, U8 (alternate COM20022 device) must not be mounted on
evaluation board.
JP10
JP11
JP12
JP13
JP1
JP2
JP3
JP4
JP5
JP6
JP7
JP8
JP9
S3
For proper isolated RS-485 operation, installed jumpers denoted in black
Direct Coupled RS-485 Connected to RJ11
Twisted Pair ARCNET Connected to RJ11
Isolated RS-485 Connected to RJ11
SKT1
S2
7
COAX Connected to BNC
6
DRQ
JP3
5
Fast/Slow Bus Timing
3
COAX Termination
RJ11 Termination
1
See TMC Spec
0
DACK Select
DRQ Select
TX Enables
RX Enables
IRQ Select
7
DACK
6
JP2
5
JP4
U8
3
1
1
0
15
12
JP1
IRQ
11
10
Figure 4
9
Page 8
7
5
4
1
U15
3
JP13
A
B
C
D
1
JP5
1
2
A
B
C
D
1
3
1
3
1
3
1
3
1
3
1
A
B
C
D
1
U12
C
D
A
B
U13
JP7
`
2 RJ11 Terminated
4 RJ11 Terminated
4 Connected
4 Connected
2 Connected
4 Connected
4 Connected
2 COAX Terminated
2 High Speed Timing
2 Not Connected, Normal Timing
Direct Coupled RS-485
Coaxial
2 Connected
2 Connected
2 Connected
Direct Coupled RS-485
Coaxial
Twisted Pair ARCNET
Isolated RS-485
Twisted Pair ARCNET
Isolated RS-485
U11
T1
JP12
JP10
JP11
JP6
JP8
JP9
1
1
1
1
1
1
LE
D
J2
S1
J1
CO
AX
Rev. 1/5/00