
EPC-7 Hardware Reference
External Clock Input
3
3
The EPC-7 provides the option, when it is configured as the slot-0 controller, of
deriving the ECL CLK10 signal from an internal oscillator or from a 10 MHz
external clock source. An SMB connector is provided on the front panel. The
external clock input is TTL compatible. It is not resistively terminated. It presents one
FAST TTL unit load (I
IH
< 0.02mA, I
IL
< -0.6 mA). The external clock signal must
have TTL levels. The choice of clock source is specified in the clock control register,
8162. Refer to Chapter 7,
VXIbus Interface
, for more information.
External Clock Output
A second SMB connector provides a TTL form of the CLK10 clock. It can drive a
50 ohm line. This is typically used to synchronize multiple VXI mainframes.
External Trigger
A third SMB connector provides for an external TTL trigger signal input or output.
When configured as an input, it is not resistively terminated and presents one FAST
TTL unit load (I
IH
< 0.02mA, I
IL
< -0.6 mA). When configured as an output, it can
drive a 50 ohm line. The direction of the signal and the association to a specific
backplane trigger line is controlled by the external trigger register, 8163. Refer to
Chapter 7,
VXIbus Interface
, for more information.
Page 14
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Содержание EPC-7
Страница 125: ...Index I 7 I I Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...
Страница 126: ...Index I 8 I I Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...
Страница 127: ...I 5 I I Index Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...
Страница 128: ...Index I 6 I I NOTES Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...
Страница 129: ...Index I 7 I I Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...