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3.3 Connector interface specification
The BHT-202BW-CE is equipped with a USB interface for interfacing with the host PC, and with a
connector interface for communicating with the host PC.
(1) Specification
• USB1.1, Full-speed compliant
• RS-232C interface
(2) Connector : TCX3171 HOSIDEN
Pin No Signal name Data direction
1 GND
2 D+ (USB) Input / Output
3 D- (USB) Input / Output
4 VBUS (USB)
5 CTS (RS-232C) Input
6 RxD (RS-232C) Input
7 RTS (RS-232C) Output
8 TxD (RS-232C) Output
(Note) 1.The input/output direction is stipulated from the BHT side.
2.Use the exclusive cable only.
Pin 1
Pin 7
Pin 8 Pin 2