Smart Modular Technologies 901773 Users Manual

OEM User’s Manual

ASY90177-3 UART SPP Module

Bluetooth Class 2 Device

Version: 0.5

ASY90177-3 User Guide 0.5 © Copyright SMART Modular Technologies 2004 Page 1 of 5

Introduction

The SMART Modular ASY90177-3 is a UART module with a customized SPP profile.
The module interfaces are listed in table 1.0

Table 1.0 Interface definitions

Pin # Name Type Note

1 of J1 Vin External input + 3.3 VDC
2 of J1 GND GND Ground
3 of J1 USB_D+ I/O USB Data Plus – not used
4 of J1 USB_D- I/O USB Data Minus – not used
5 of J1 UART_RX I/O UART Receive
6 of J1 UART_TX I/O UART Transmit
7 of J1 UART_CTS I/O UART clear to send
8 of J1 UART_RTS I/O UART Request to send

UART Interface

The Universal Asynchronous Receiver Transmitter (UART) interface provides a mechanism for communicating with
other serial devices using the RS232 standard. When the module is connected to another digital device, UART_RX
and UART_TX transfer data between the two devices. The other two signals, UART_CTS and UART_RTS, can be
used to implement RS232 hardware flow control where both are active low indicators.

Figure 1 shows the parts location including UART connector J1 and antenna ANT1.

Fig 1 Mechanical drawing

ASY90177-3 User Guide 0.5 © Copyright SMART Modular Technologies 2004 Page 2 of 5