sta015t STMicroelectronics, sta015t Datasheet - Page 12

• Manufacturer Part Number: sta015t
• Description: Mpeg 2.5 Layer Iii Audio Decoder With Adpcm Capability
• Manufacturer: STMicroelectronics

STA015-STA015B-STA015T
The following 4 figures (fig. 12, 13, 14, 15) show
the available connection diagrams as for as
ADPCM encoding function. As shown in the fig-
ures some configuration is not available in SO28
package.
Figure 13. Input from ADC, Output from I2C +
3 - I
The STA015 supports the I
tocol defines any device that sends data on to the
bus as a transmitter and any device that reads
the data as a receiver. The device that controls
the data transfer is known as the master and the
others as the slave. The master always starts the
transfer and provides the serial clock for synchro-
nisation. The STA015 is always a slave device in
all its communications.
12/44
MASTER
SLAVE
MCU
ADC
MCU
ADC
2
C BUS SPECIFICATION
DATA_REQ
DATA_REQ
LRCK_ADC
I
2
SCK_ADC
SDI_ADC
C
IRQ
I
SDI_ADC
2
C
STA015
LFBGA64
STA015
LFBGA64
TQFP44
TQFP44
LRCKT
SCKT
SO28
SO28
2
C protocol. This pro-
LRCKT
OCLK
SCKT
OCLK
SDO
SDO
D99AU1123A
DAC
DAC
Figure 12. Input from BITSTREAM, Output from
Figure 14. Input from BITSTREAM, Output from
Figure 15. Input from ADC, Output from GPSO
3. 1 - COMMUNICATION PROTOCOL
3.1.0 - Data transition or change
Data changes on the SDA line must only occur
when the SCL clock is low. SDA transition while
the clock is high are used to identify START or
STOP condition.
3.1.1 - Start condition
START is identified by a high to low transition of
the data bus SDA signal while the clock signal
SCL is stable in the high state.
A START condition must precede any command
for data transfer.
MASTER
MCU
ADC
MCU
MCU
DATA_REQ
GPSO_SCKR
GPSO_DATA
GPSO_REQ
LRCK_ADC
SCK_ADC
BIT_EN
SDI_ADC
SCKR
SDI
I
I2C
GPSO
GPSO_DATA
GPSO_SCKR
2
GPSO_REQ
DATA_REQ
C
BIT_EN
SCKR
SDI
I
2
C
STA015
LFBGA64
TQFP44
STA015
LFBGA64
STA015
LFBGA64
TQFP44
TQFP44
SO28
D99AU1122A
LRCKT
OCLK
SCKT
SDO
LRCKT
D99AU1121A
SCKT
OCLK
SDO
LRCKT
OCLK
SCKT
SDO
DAC
D99AU1124A
DAC
DAC