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Part Number SIO7

Copyright © 2014 ABCircuits. Revised September 2014 Page 4 of 7

You can drive this input with any hexadecimal terminal program like REALTERM for testing and

development.

SOUT-

This is the serial output pin. It may be tied directly to the UART receiver input of your UART or

microprocessor; to a RS -232 driver such as the MAX232; an Ethernet interface such as the

Lantronix Xport, or a USB IC such as the FT232. This pin is high in the idle state, the output

format is 8 bits, 1 stop, no parity at 9600 BPS. Other output formats and baud rates are

available, please contact the factory for information. Bit 8 of the transmitted byte is a zero.

You can monitor this output with any hexadecimal terminal program like REALTERM. Hyperterm

does not display in hexadecimal.

IA0-6

These are the input bits that will be transmitted on the SOUT- pin when a change is detected, if

no change is detected, they will be transmitted every 100 mS. These inputs have internal pull up

resistors.

VSS

Connect to system ground.

VDD

Connect to supply voltage of 2.4 to 5 volts. A .1 uF decoupling capacitor to ground is

recommended.

NOTES:

Make no connection to the NC pins. Pins 5 and 15 must be left unconnected.

Serial Input Stream

START

OA6

OA3

OA1

STOP

OA4

BIT CELLS

OA5

OUTPUT OA BITS

0

DATA STREAM

OA0

OA2

When a byte is received on the SIN- pin the byte is placed on the OA pins.

The eighth bit must

be a zero or the byte is ignored. The SIO7 automatically removes start and stop bits from the

data stream. The data is format is 9600 BPS, 8 bits, 1 stop, no parity.