# DAISY-9 - RS232 interface

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Not-isolated RS232 DTE serial asyncronous interface for Terra and FOX boards 
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The signals are available on a Canon DB9 male connector. Only the RXD, TXD, RTS and CTS signals are available.

<img style="float:left;" src="./rs232_db9.gif"/>

Pin | Function | Direction
----|----------|-----------
 1 |
 2 | RXD - RX data | Input
 3 | TXD - TX data | Output
 4 |
 5 | GND - Signal ground |
 6 |
 7 | RTS - Request to send | Output
 8 | CTS - Clear to send | Input
 9 |

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The daisy connectors where it's possible to plug this board are:

| TERRA | FOX G20| Serial device  | Signals available -|
|-------|--------|----------------|--------------------|
| D13   | D1     | /dev/ttyS2     | TXD, RXD, RTS, CTS |
|       | D3     | /dev/ttyS1     | TXD, RXD, RTS, CTS |
| D10   | D6     | /dev/ttyS4     | TXD, RXD, RTS, CTS |
|       | D8     | /dev/ttyS3     | TXD, RXD           |

On the FOX Board G20 is requested a [Daisy-1](/DAISY-1) adapter to wire-up this board.

The board size is 40x45x18mm


## Schematics, datasheets and related links

*  [DAISY 9 Schematic](http://terzo.acmesystems.it/download/schematics/schematic_daisy9.pdf)
*  [MAX3232 datasheet](http://www.maxim-ic.com/datasheet/index.mvp/id/1068)
*  [Serial programming examples](/foxg20_serial_rs232)
*  [Daisy modules and other boards available](/hqr)

@shop='DAISY-9'
@shop='FLAT-20CM'
@shop='TERRA'