Marvin Test Solutions GX5280, User Manual

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26 GX5280 User Guide
Vector Program Control States
The GX5280 Vector Program Control functions in three basic operational states; Halt , Pause and Run .
Figure 4-7 is a block diagram showing the relationship of these operational states.
Arm
Halt
Trigger
Pause
Run
Halt
Pause
Halt
Figure 4-7: GX5280 Operational States
Halt State
The GX5280 Vector Program Control goes into a Halt state after a Reset signal and following the Halt command.
All external event inputs as well as external control inputs are ignored following a Halt command. Following Reset,
all I/O pin (channels) are in the receiving mode of operation. The program counter is zero, the frequency is set to an
internal 10MHz, and the strobe timing is set to 5nSec.
Pause State
The Vector Program Control enters a Pause state from a Halt state with an ARM command sent by the PC bus, or
from Run state following Pause command.
Run State
In the Run state, data is being output and input is being latched and the program counter holds the address of the
current output. While running channels that are defined as output send the data from the memory located at the
program counter address and the channels that are defined as input receive data.