Airlogic ABM-200 Application Note - page 4
Bluetooth™ Module Application Note
Copyright © 2004 AirLogic Co., Ltd.
All specification are preliminary and AirLogic reserves the right to change these without notice.
http://www.airlogic.co.kr
9. UART Interface
ABM-200-1xxx Universal Asynchronous Receiver and Transmitter(UART) interface provides a
simple mechanism for communicating with other serial device using the RS232 standard.
When ABM-200-1xxx is connected to another digital device, UART_RX and UART_TX
transfer data between the two devices. The remaining two signal, UART_CTS, UART_RTS,
can be used to implement RS232 hardware flow control where both are active low indicators.
All UART connections are implemented using CMOS technology and have signaling levels of
0V and VDD
10. USB Interface
ABM-200-1xxx USB devices contain a full speed(12Mbit/s) USB interface that is capable of
driving of a USB cable directly. No external USB transceiver is required. The device operates as
a USB peripheral, responding to requests from a master host controller such as a PC. Both the
OHCI and the UHCI standards are supported. The set of USB endpoints implemented behave as
specification V1.1
As USB is a Master/Slave oriented system(in common with other USB peripherals), ABM-200-
1xxx only supports USB slave operation.
ABM-200-1xxx features an internal USB pull-up resistor. This pulls the USB+ pin weakly high
when ABM-200-1xxx is ready to enumerate. It signal to the PC that it is a full speed(12Mbit/s)
USB device.