Technical information

2.4.6 DRQ3B Parallel Interface

The DRQ3B is a high-speed parallel interface that provides two

independent 16-bit, unidirectional data channels.

Functional Information

Two unidirectional channels Each 512-word FIFO

Interrupt vectors One for both DMA channels

One for all other interrupts

Ordering Information

DRQ3B–SF Field-installed kit

Cables Connects the DRQ3B to a user device or to another

DRQ3B. Order two cables for each DRQ3B module.

BC19T–25/–50: 7.6 m (25 ft)/15.2 m (50 ft)

Performance

Throughput rates Burst: 500 kilowords

Block: 1.1 megawords

Extended block mode: 1.1 megawords

Height speed: 1.4 megawords

Conﬁguration Information

Form factor Quad height

Power requirements + 5 Vdc, 4.5 A; +12 Vdc, 0.0 A

Power consumption 22.5 W

Bus loads 2.0 ac; 0.5 dc

Module connectors Two 50-pin female IEEE connectors

I/O port data transceivers Source 16 mA, sink 64 mA