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Revision B User Manual
for the VME-SIO4: Board Revision: A
General Standards Corporation
8302A Whitesburg Drive Huntsville, AL 3580, Phone: (256) 880-8787
42
A16
A17
A18
A19
A20
A21
A22
A23
On-Board
Rx/Tx Clock
On-Board
Rx/Tx Clock
Examples of the base address jumpers are shown below:
(a) Set for non-supervisory
(b) Set for supervisory A24 space at a
A16 space at a base address
at a base address of 0x948000.
of 0xC000:
4.3
THE ZILOG CLOCK SELECT JUMPERS (J11, J14)
The purpose of these jumpers is to select where the Zilog clock comes from or goes to. If Zilog clock uses the
onboard transmit/receive clock, or the cable clock, then the jumpers should be installed. If the Zilog is going to
generate an output clock to the cable, then some of the jumpers should not be installed. The Zilog Clock Select
Jumpers are shown below:
•
Channel 0/2 Zilog uses the onboard OSC, U28, for Transmit and Receive.
•
Channel 1/3 Zilog uses the onboard OSC for Transmit and cable Receive clock for Receive.
•
Cable Transmit clock will be onboard OSC.
Description of Jumpers shown above:
•
Channel 0/2 Zilog uses the on-board OSC for Rcv and will generate and output a transmit clock of a software
programmed frequency.
•
Channel 1/3 Zilog uses the enable Rx clock for both transmit and Rcv.
•
The transmit clock will be the same as the Rcv clock.
•
Channel 0/2 and 1/3 will use the cable Rcv clock for Rcv and will generate and output a transmit clock of a
software programmed frequency.
J11 is used for Channels 0 and 1
J14 is used for Channels 2 and 3
A10
A11
A12
A13
A14
A15
Spare
Spare
J4
A16
A17
A18
A19
A20
A21
A22
A23
J1 J5
A10
A11
A12
A13
A14
A15
Spare
Spare
J1 J5
J4
Chan 3 Tx Clock
Chan 2 Tx Clock
Chan 3 Rx Clock
Chan 2 Rx Clock
1 6 11
5 10 15
Chan 1 Tx Clock
Chan 0 Tx Clock
Chan 1 Rx Clock
Chan 0 Rx Clock
1 6 11
5 10 15
A24
Super
A24
Super