TLC32040M Datasheet, PDF (29/30 Pages) Texas Instruments – ANALOG INTERFACE CIRCUIT

TLC32040M
ANALOG INTERFACE CIRCUIT
PRINCIPLES OF OPERATION
serial port
The serial port has four possible modes that are described in detail in the terminal functions table. These modes
are briefly described below and in the description for terminal 13, WORD/BYTE.
1. The transmit and receive sections are operated asynchronously, and the serial port interfaces directly
with the DSP in two 8-bit bytes.
2. The transmit and receive sections are operated asynchronously, and the serial port interfaces directly
with the SMJ32020, SMJ320C25, and the SMJ320C30.
3. The transmit and receive sections are operated synchronously, and the serial port interfaces directly
with the DSP in two 8-bit bytes.
4. The transmit and receive sections are operated synchronously, and the serial port interfaces directly
with the SMJ32020, SMJ320C25, SMJ302C30, or two SN54299 serial-to-parallel shift registers,
which can then interface in parallel to the SMJ320C10, SMJ320C15, SMJ320E15 to any other digital
signal processor, or to external FIFO circuitry.
operation with internal voltage reference
The internal reference eliminates the need for an external voltage reference and provides overall circuit cost
reduction. Thus the internal reference eases the design task and provides complete control over the
performance of the integrated circuit. The internal reference is brought out to a pin and is available to the
designer. To keep the amount of noise on the reference signal to a minimum, an external capacitor can be
connected between REF and ANLG GND.
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