TDA7310 STMicroelectronics, TDA7310 Datasheet - Page 11

• Manufacturer Part Number: TDA7310
• Description: Audio DSPs Serial Audio Proc
• Manufacturer: STMicroelectronics

Specifications of TDA7310

• Mounting Style: SMD/SMT
• Package / Case: PQFP-44
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATION INFORMATION (continued)
The audioprocessor which has been addressed
has to generate an acknowledge after the recep-
tion of each byte, otherwise the SDA line remains
at the HIGH level during the ninth clock pulse
time. In this case the master transmitter can gen-
erate the STOP information in order to abort the
transfer.
Transmission without Acknowledge
Avoiding to detect the acknowledge of the audio-
processor, the P can use a simpler transmission:
simply it waits one clock without checking the
slave acknowledging, and sends the new data.
MAX CLOCK SPEED 100kbits/s
SOFTWARE SPECIFICATION
Chip address
A = LOGIC LEVEL ON PIN ADDR
DATA BYTES
Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; Gx = 6.25dB steps
STATUS AFTER POWER ON RESET
ACK = Acknowledge
S = Start
P = Stop
MSB
S
Volume
speaker
audio Switch
bass
treble
gain
1
MSB
0
1
1
1
1
0
0
0
1
MSB
0
TDA7310 ADDRESS
0
0
first byte
0
1
1
0
0
1
1
1
0
0
1
0
0
B2
0
1
0
1
0
1
1
A
1
0
LSB
AC K
Stereo 5
0
G1
-77.5dB
-37.5dB
B1
B1
B1
B1
B1
0
1
+2dB
+2dB
0dB
MSB
A
G0
C3
C3
B0
B0
B0
B0
B0
LSB
0
DATA
Data Transferred (N-bytes + Acknowledge)
A2
A2
A2
A2
A2
S2
C2
C2
This approach of course is less protected from
misworking and decreases the noise immunity.
Interface Protocol
The interface protocol comprises:
A start condition (s)
A chip address byte, containing the TDA7310
address (the 8th bit of the byte must be 0). The
TDA7310 must always acknowledge at the end
of each transmitted byte.
A sequence of data (N-bytes + acknowledge)
A stop condition (P)
LSB
A1
A1
A1
A1
A1
S1
C1
C1
A C K
MSB
LSB
C0
C0
A0
A0
A0
A0
A0
S0
DATA
Volume control
Speaker ATT LR
Speaker ATT RR
Speaker ATT LF
Speaker ATT RF
Audio switch
Bass control
Treble control
FUNCTION
TDA7310
LSB
A C K
11/15
P