PCM-UIO96B Universal 96-Point Digital I/O with Interruptible Event Sense Features • 96 Bidirectional digital I/O lines • Each line is capable of: • Input, Output or Output with Readback • 12mA sink current • Supports 48 event sense lines • Generates an interrupt on signal change-of-state • Software selectable edge polarity for each line • Software enabled interrupt for each line • Change-of-state latched for each line • Write-protection mask register for each 8-bit port • Compatible with industry standard I/O racks • Fused +5V logic supply for I/O modules • 16-bit PC/104 interface • +5 volt only operation • Extended temperature range: -40°C to +85°C Product Description The PCM-UIO96B is a highly versatile PC/104 input/output module providing 96 lines of digital I/O. One important feature of this card is its ability to monitor 48 of the 96 lines for both rising and falling digital edge transitions, latch them and then interrupt the host processor notifying that a change-of-input status has occurred. This is an efficient way of signaling the CPU of real-time events without the burden of polling the digital I/O. Parallel I/O Controller - WinSystems has designed the WS16C48 Universal I/O controller ASIC to support various input/output and interrupt configurations. The WS16C48 supports 48 digital I/O lines addressed through six contiguous registers as ports P0-P5. A six-bit Write Mask register allows the user to disable Writes on a byte basis to configure the group as a “Read Only” port. Two WS16C48 chips are on the PCM-UIO96B. Each I/O line is individually programmable for input, output, or output with readback operation. The input lines are connected so the current status of its output port can be read from the corresponding input port (readback). If the port is used as input only, then the corresponding output port bit must be cleared. Each output channel is latched and has an open collector driver (with a pull-up resistor) capable of sinking 12mA of current. This allows direct control of up to 96 opto-isolated signal conditioning modules to a single card for high-density I/O support. WinSystems | 715 Stadium Drive, Arlington, TX 76011 USA | Tel 817-274-7553 | Info@Wi

PCM-UIO96B: Universal 96-Point I/O Module Event Sense Operation - Each WS16C48 ASIC supports 24 event sense lines which can generate an interrupt when an event occurs. These lines are the first three I/O ports on the chip, P0-P2. Since two WS16C48s are onboard, the PCM-UIO96B can sense a positive or negative transition on up to 48 lines. Transition polarity is programmable and enabled on a bitby-bit basis. Each lines’ transition is latched by the event so that even short duration pulses will be recognized. An interrupt ID register is maintained for each line for writing more efficient Interrupt...