PCM-SDIO - PC/104 Quad Serial and 48-line Digital I/O
The WS16C48 controller supports 48 digital I/O lines ad-
dressed through six contiguous registers. 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. Each
I/O line is individually programmable for input, output, or
output with Read back operation. The input lines are con-
nected so the current status of its output port can be read
from the corresponding input port (Read back). 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 48 opto-isolated
signal conditioning to a single card for high density I/O
There is a FET on each digital I/O line with an open-drain
configuration that can support from 5 to 30 volts.
Event Sense Operation - The WS16C48 supports 24 event
sense lines to generate an interrupt when an event occurs.
This means that 24 lines of the digital I/O can sense a posi-
tive or negative transition on the input. Transition polarity
is programmable and enabled on a bit-by-bit basis. Each
line’s transition is latched by the event so that even short
duration pulses will be recognized.
Front and Back Picture of PCM-SDIO
PC/104 Bus, 8- or 16-bit stackthrough
48 Digital I/O lines, TTL compatible
4 Asynchronous serial channels the support RS-232/422/
485 interface levels
Data rate up to 115.2 kbps
+5V ±5% at 250 mA (typ.)
Operational from -40° to +85°C
RoHS compliant Yes
The PCM-SDIO has easy-to-use 0.100” box header connec-
tors to access the serial and digital I/O. WinSystems has
optional cables or a user can make their own.
3.6 x 3.8 inches (90 x 96mm)
3.2 oz (90.7 gm)
Interrupts - Interrupts are generated on error conditions
or receive/transmit buffer status for each of the serial chan-
nels. Each of the four channels are routed to a FPGA and
then to the PC/104 Bus connector. The event sense lines
of the digital I/O can generate interrupts as well. The FPGA
offers extreme flexibility with interrupt selection, IRQ as-
signment, and interrupt sharing.
The PCM-SDIO also contains a Read Only Interrupt Sta-
tus Register to allow quick identification of the UART
channel(s) needing service.
WinSystems - The PCM-SDIO is a replacement and is pin
compatible for the PCM-UIO48A and PCM-UIO48A-G as
well as for WinSystems’ PCM-COM4A.
The PCM-SDIO supports Linux, Windows XPe, and DOS.
Free drivers are downloaded from our website.
PCM-SDIO-144 Four serial channel and 48-line digital I/O
card PC/104 interface
4-ft., Opto rack interface
4-ft., ribbon cable, 50 pin. Both ends
with 50-pin socket termination
CBL-173-G-1-1.0 20-pin ribbon cable to two 9-pin,
male D sub connectors
WinSystems reserves the right to make changes to prod-
ucts and/or documentation without further notification.
Product names of other companies may be trademarks of
their respective companies.
OEM Configurations - If you need a special configura-
tion, contact a WinSystems factory application engineer to
discuss your requirement.
WinSystems | 715 Stadium Drive, Arlington, TX 76011 USA | Tel 817-274-7553 | Info@WinSystems.com | www.WinSystwemws.wco.mparhelia-bv.com
+31(0)10 284 95 46