Self-define

input/output

(PIN1-PIN24)

RXD

IN

data input, supporing 1.8V/3.3V/5V with its Pull up/down setting

TXD

OUT

data output, supporing 1.8V/3.3V/5V with its Pull up/down setting

RTS

OUT

send request, with its Pull up/down setting

CTS

IN

send cancel, with its Pull up/down setting

DSR

IN

data device in order, with its Pull up/down setting

DTR

OUT

data terminal in order, with its Pull up/down setting

USB D-

USB DATA- cable, compatible USB2.0 protocol

USB D+

USB DATA+ cable, compatible USB2.0 protocol

VCC

to supply the power on current over 1A, with over-current protection in 10US (programmable)

GND

to bear the hemoperfusion current over 1A

High level

to supply 20MA constant current as power on supply or USB VCC; settings error won’t damage the phone.

Low level

to provide 20MA permanent hemoperfusion current as power on supply; settings error won’t damage the p, hone

Pull up/down

to provide two sets pullup and pulldown (10K, 2K) resistance, eg: pullup to OM chip