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ST5090AD Scheda tecnica(PDF) 3 Page - STMicroelectronics

Il numero della parte ST5090AD
Spiegazioni elettronici  LOW VOLTAGE 14-BIT LINEAR CODEC WITH HIGH-PERFORMANCE AUDIO FRONT-END
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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PIN FUNCTIONS (SO28)
Pin
Name
Description
1
N.C.
Not Connected.
2VCCA
Positive power supply input for the analog section.
+5V
±10% or 3.3V ±10% selectable. VCC and VCCA must be directly connected together.
3VCCP
Positive power supply input for the power section. 5V
±10% or 3.3V ±10% selectable VCCP and
VCC must be connected together.
4
N.C.
Not Connected.
5,6
VFr+,VFr– Receive analog earpiece amplifier complementary outputs. These outputs can drive directly earpiece
transductor. The signal at this output can be the sum of:
- Receive Speech signal from DR,
- Internal Tone Generator,
- Sidetone signal.
7,8
VLr+,VLr– Receive analog extra amplifier complementary outputs. The signal at these outputs can be the
sum of:
- Receive Speech signal from DR,
- Internal Tone generator,
- Sidetone signal.
9
GNDP
Power ground. VFr and VLr driver are referenced to this pin. GNDP and GND must be connected
together close to the device.
10
DR
Receive data input: Data is shifted in during the assigned Received time slots In delayed and non-
delayed normal frame synchr. modes voice data byte is shifted in at the MCLK frequency on the
falling edges of MCLK, while in non-delayed reverse frame synchr. mode voice data byte is shifted in
at the MCLK frequency on the rising edges of MCLK.
11
CCLK
Control Clock input: This clock shifts serial control information into CI and out from CO when the
CS- input is low, depending on the current instruction. CCLK may be asynchronous with the other
system clocks.
12
CS-
Chip Select input: When this pin is low, control information is written into and out from the ST5090
via CI and CO pins.
13
CI
Control data Input: Serial Control information is shifted into the ST5090 on this pin when CS- is low
on the rising edges of CCLK.
14
BZ
Pulse width modulated buzzer driver output.
15
VCC
Positive power supply input for the digital section. +5V
±10% or 3.3V ±10% selectable.
16
CO
Control data Output: Serial control/status information is shifted out from the ST5090 on this pin
when CS- is low on the falling edges of CCLK.
17
DX
Transmit Data ouput: Data is shifted out on this pin during the assigned transmit time slots.
Elsewhere DX output is in the high impedance state. In delayed and non-delayed normal frame
synchr. modes, voice data byte is shifted out from TRISTATE output DX at the MCLK on the rising
edge of MCLK, while in non-delayed reverse frame synchr mode voice data byte is shifted out on
the falling edge of MCLK.
18
GND
Ground: All digital signals are referenced to this pin.
19
FS
Frame Sync input: This signal is a 8kHz clock which defines the start of the transmit and receive
frames. Any of three formats may be used for this signal: non delayed normal mode, delayed
mode, and non delayed reverse mode.
20
MCLK
Master Clock Input: This signal is used by the switched capacitor filters and the encoder/decoder
sequencing logic. Values must be 512 kHz, 1.536 MHz, 2.048 MHz or 2.56 MHz selected by means of
Control Register CRO. MCLK is used also to shift-in and out data.
21
LO
A logic 1 written into DO (CR1) appears at LO pin as a logic 0
A logic 0 written into DO (CR1) appears at LO pin as a logic 1.
22
MIC2-
Second negative high impedance input to transmit pre-amplifier for microphone connection.
23
MIC2+
Second Positive high impedance input to transmit pre-amplifier for microphone connection.
24
MIC1-
Negative high impedance input to transmit pre-amplifier for microphone connection.
25
MIC1+
Positive high impedance input to transmit pre-amplifier for microphone connection.
26
GNDA
Analog Ground: All analog signals are referenced to this pin. GND and GNDA must be connected
together close to the device.
27
MIC3-
Third negative high impedance output to transmit preamplifier for microphone connection.
28
MIC3+
Third positive high impedance output to transmit preamplifier for microphone connection.
ST5090
3/29


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