Interfaces; Asc0 - Serial Device; General Purpose I/O; Dac/Adc - Siemens Java TC65 User Manual

TC65 JAVA User's Guide
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4.2

Interfaces

4.2.1

ASC0 - Serial Device

ASC0, an Asynchronous Serial Controller, is a 9-wire serial interface. It is described in the
Hardware Interface Description [4]. Without a running Java application the module can be
controlled by sending AT commands over ASC0. Furthermore, ASC0 is designed for
transferring files from the development PC to the module and for controlling the module with
AT commands. When a Java application is started, ASC0 can be used as an RS-232 port.
Refer to the Java doc [5] for details.
4.2.2

General Purpose I/O

There are ten I/O pins that can be configured for general purpose I/O. When the TC65 starts
up, all 10 pins are set, by default, to a high-impedance state for use as input. One pin can be
configured as a pulse counter. All lines can be accessed under Java by AT commands. See
[3] and [4] for information on configuring the pins.
4.2.3

DAC/ADC

There are two analogue input lines and one analogue output line. They are accessed by AT
commands. See [3] and [4] for details.
4.2.4

ASC1

ASC1 is the second serial interface on the module. This is a 4-pin interface (RX, TX, RTS,
CTS). It can be used as a second AT interface when a Java application is not running or by a
running Java application as System.out.
4.2.5

Digital Audio Interface (DAI)

The TC65 has a seven-line serial interface with one input data clock line and input/output
data and frame lines to support the DAI. Refer to the AT Command Set [3] and Hardware
Interface Description [4] documents for more information.
4.2.6

I2C/SPI

There is a 4 line serial interface which can be used as I2C or SPI interface. It is described in
the Hardware Interface Description [4]. The at^sspi at command configures and drives this
interface. For details see [4].
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26.09.2005