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TLC32044CFN Datasheet(PDF) 3 Page - Texas Instruments

Part No. TLC32044CFN
Description  VOICE-BAND ANALOG INTERFACE CIRCUITS
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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TLC32044CFN Datasheet(HTML) 3 Page - Texas Instruments

 
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TLC32044C, TLC32044E, TLC32044I, TLC32044M, TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F − MARCH 1988 − REVISED MAY 1995
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
functional block diagram
M
U
X
M
U
X
IN +
IN −
AUX IN +
AUX IN −
Internal
Voltage
Reference
SHIFT CLK
MSTER CLK
EODR
DR
FSR
WORD/BYTE
DX
FSX
EODX
SERIAL
PORT
A/D
OUT +
OUT −
M
U
X
D/A
sin x/x
Correction
Filter
Filter
Transmit Section
VCC + VCC − ANLG
GND
DTGL
GND
VDD
(Digital)
REF
RESET
Receive Section
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
NO.
I/O
DESCRIPTION
ANLG GND
17,18
Analog ground return for all internal analog circuits. Not internally connected to DGTL GND.
AUX IN +
24
I
Noninverting auxiliary analog input stage. AUX IN + can be switched into the bandpass filter and A/D
converter path via software control. If the appropriate bit in the control register is a 1, the auxiliary inputs
AUX IN +
24
I
Noninverting auxiliary analog input stage. AUX IN + can be switched into the bandpass filter and A/D
converter path via software control. If the appropriate bit in the control register is a 1, the auxiliary inputs
will replace the IN + and IN − inputs. If the bit is a 0, the IN + and IN − inputs will be used (see the AIC DX
will replace the IN + and IN − inputs. If the bit is a 0, the IN + and IN − inputs will be used (see the AIC DX
data word format section).
AUX IN −
23
I
Inverting auxiliary analog input (see the above AUX IN + description).
DGTL GND
9
Digital ground for all internal logic circuits. Not internally connected to ANLG GND.
DR
5
O
Data receive. DR is used to transmit the ADC output bits from the AIC to the TMS320 (SMJ320) serial port.
This transmission of bits from the AIC to the TMS320 (SMJ320) serial port is synchronized with the SHIFT
CLK signal.
DX
12
I
Data transmit. DX is used to receive the DAC input bits and timing and control information from the TMS320
(SMJ320). This serial transmission from the TMS320 (SMJ320) serial port to the AIC is synchronized with
the SHIFT CLK signal.
EODR
3
O
End of data receive. (See the WORD/BYTE description and Serial Port Timing diagram.) During the
word-mode timing, EODR is a low-going pulse that occurs immediately after the 16 bits of A/D information
have been transmitted from the AIC to the TMS320 (SMJ320) serial port. EODR can be used to interrupt
a microprocessor upon completion of serial communications. Also, EODR can be used to strobe and enable
external serial-to-parallel shift registers, latches, or external FIFO RAM, and to facilitate parallel data bus
communications between the AIC and the serial-to-parallel shift registers. During the byte-mode timing,
EODR goes low after the first byte has been transmitted from the AIC to the TMS320 (SMJ320) serial port
and is kept low until the second byte has been transmitted. The DSP can use this low-going signal to
differentiate between the two bytes as to which is first and which is second. EODR does not occur after
secondary communication.


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