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STA014 bảng dữ liệu(PDF) 11 Page - STMicroelectronics

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STA014 bảng dữ liệu(HTML) 11 Page - STMicroelectronics

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MCU
GPSO_SCKR
GPSO_SCKR
GPSO_REQ
GPSO_DATA
GPSO_DATA
GPSO_REQ
D00AU1145
Figure 10.
To enable the GPSO interface bit GEN of
GPSO_ENABLE register must be set. Using the
GPSO_CONF register the protocol can be config-
ured in order to provide outcoming data on ris-
ing/falling edge of GPSO_SCKR input clock; the
GPSO_REQ request signal polarity (usually con-
nected to an MCU interrupt line) can be config-
ured as well.
3.4 ADC Inteface
Beside the serial input interface based on SDI
and SCKR lines a 3 wire flexible and user config-
urable input interface is also available, suitable to
interface with most A/D converters. To configure
this interface 4 specific I
2C registers are available
(ADC_ENABLE, ADC_CONF, ADC_WLEN and
ADC_WPOS). Refer to registers description for
more details.
3.5 General Purpose I/O Interface
A new general purpose I/O interface has been
added to this device (TQFP44 and LFBGA64
only). Actually only the strobe line is used in
ADPCM encoding mode to provide an interrupt;
other pins are reserved for future use. The re-
lated configuration register is GPIO_CONF. See
the following summary for related pin usage:
Name
Description
Dir
I/ODATA [0]
....................
I/ODATA [7]
GPIO data line
I/O
....
I/O
GPIO_STROBE
GPIO strobe line
I/O
4 ADPCM ENCODING: Overview
According to the previously described interfaces
there are 4 ways to manage ADPCM data stream
while encoding. Input interface can be either the
serial receiver block (SDI + SCKR + DATA_REQ
lines) or the ADC specific interface.
Output interfaces can be either the I
2C bus (with
or without interrupt line) or the GPSO high-speed
serial interface (GPSO_REQ + GPSO_ DATA +
GPSO_SCKR lines). This result in the following 4
methods to handle encoding flow:
INPUT (data to encode)
Output (encoded data)
Available on
package
ADC I/F (SDI_ADC + LRCK_ADC + SCK_ADC)
GPSO I/F (GPSO_REQ + GPSO_DATA +
GPSO_SCKR)
TQFP44
LFBGA64
ADC I/F (SDI_ADC + LRCK_ADC + SCK_ADC)
I
2C + Interrupt (SCL + SDA + DATA_REQ)
SO28/TQFP44
LFBGA64
SERIAL I/F (SCKR + SDI + DATA_REQ)
GPSO I/F (GPSO_REQ + GPSO_DATA +
GPSO_SCKR)
TQFP44
LFBGA64
SERIAL I/F (SCKR + SDI + DATA_REQ) (*)
I
2C (polling) (SCL + SDA)
SO28/TQFP44
LFBGA64
(*) STA013 Compatible mode
ADC I/F
ENCOD
ENGINE
I2C
GPSO
MUX
SDA
SCL
DATA_REQ
LRCK_ADC
SDI_ADC
SCK_ADC
GPSO_REQ
GPSO_DATA
GPSO_SCKR
SERIAL
RECEIVER
SDI
SCKR
DATA_REQ
D99AU1064
Figure. 11
STA014-STA014B-STA014T
11/45


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