RS232-ADP is a high-speed RS232 Serial RS232 to UART TTL level converter module. It is allow you to connect the serial COM port on your computer directly to the module. The module then translates RS232 level to TTL level on the TXD and RTS lines. Also, translate TTL level back to RS232 level on RXD and CTS lines.
This board features innovations that set it apart from other RS232 Adapter boards. Innovations feature like RXD and TXD status LEDs. Quick and easy connect that you can plug directly on to the breadboard. The board is small and compact in size 1.50 x 1.25 inches.
The TX and RX pins from the RS232-ADP can be connected directly to RX and TX pins of your preferred 5V logic microcontroller. You only need to supply 5VDC to the board.
The RS232-ADP board is perfect for embedded systems that require a serial connection to a computer. The board attaches directly to the computer COM port via a serial DB9 cable. The PC serial port transmits and receives signals at +/-12V while TTL devices including microcontroller operate at +5V and GROUND. In order for you to interface between the two, youll need this interfacing circuit.
PIN FUNCTION DESCRIPTION SUMMARY TABLE:
10-PIN   Name   DB9   Voltage Converted
1     +5V     N/A
RXD     2     YES
3     TXD     3     YES
4     GND     5
5     RTS     7   YES
6     CTS     8     YES
7     CD     1     NO
8     DTR     4     NO
9     DSR     6     NO
10     RI     9     NO
True RS232 level conversion
Meets all EIA-232-E and V.28 specifications
High speed up to 200 KB/S transmission rate
Operate from a single 5V supply
TXD and RXD status LEDs
Decoupling supply voltage
Design easy for breadboard
High quality double sided PCB
Full hardware handshaking
All SMT components
-40 to +85C operating range
Small and compact in size 1.50 x 1.25 inches
Straight 0.1 header pins
Full access to all DB9 interface pins
For more information please see:
RS232-ADP User Manual