Semiconductor microscope data interface for computer

Details Semiconductor microscope data interface for computer Semiconductor microscope data interface for computer

1994-04-26

1996-09-03

Shin, Christopher B.

Boots, shoes, and leggings

395892, 395309, 395733, 3642383, 3642417, 3642357, 364DIG1, G06F 1314

Patent

active

055533000

ABSTRACT:
An interface for connecting the printer port of an SEM microscope to a computer is disclosed. The interface includes a latch for receiving data outputted from the printer port of the microscope, an I/O controller and a flip-flop circuit. The I/O controller is for transferring data from the latch to a computer bus. The I/O controller also presets a busy flag to a state which indicates that the I/O interface is idle. In addition, the I/O controller outputs an acknowledge signal to the microscope printer port in response to receiving an interrupt request signal therefrom. The flip-flop circuit is for storing the busy flag. In response to a strobe signal, the flip-flop circuit changes the busy signal to indicate that the I/O controller is busy transferring data. Furthermore, the flip-flop circuit is for enabling the latch to store data transferred from the microscope printer port, in response to the strobe signal.

REFERENCES:
patent: 4369516 (1983-01-01), Byrns
patent: 4700604 (1987-10-01), Morikawa et al.
patent: 5204734 (1993-04-01), Cohen et al.
patent: 5339395 (1994-08-01), Pickett et al.

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