DEMOTS4956J STMicroelectronics, DEMOTS4956J Datasheet - Page 8

• Manufacturer Part Number: DEMOTS4956J
• Description: BOARD DEMO TS4956EIJT/EIKJT
• Manufacturer: STMicroelectronics

Specifications of DEMOTS4956J

• Amplifier Type: Class AB
• Output Type: 1-Channel (Mono) with Mono and Stereo Headphones
• Max Output Power X Channels @ Load: 1W x 1 @ 8 Ohm; 43mW x 2 @ 32 Ohm
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4956
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.7 V to 5.5 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4956
• Other names: 497-6381; DEMOTS4956J

Typical application schematic
8/55
In order to read data from the TS4956, after the "start" message, the MCU must send and
receive the following data:
●
●
All bytes are read with the MSB bit first. The transfer of read data is ended with a "stop"
message. When transmitting several bits of data, the data can be read with having to repeat
the "start" message and the byte with slave address. In this case the value of the control
register is read repeatedly.
Figure 3.
Table 7.
1. SD = shutdown mode
Output mode #
G = audio gain
MIP = mono input positive
MIN = mono input negative
RIN = stereo input right
LIN = stereo input left
send byte with the I²C 7-bit slave address and with the R/W bit set high.
receive the data (control register value).
0
1
2
3
4
5
6
7
SDA
SDA
I²C read/write operation
Output mode selection: G from -34.5 dB to + 12 dB (by steps of 1.5 dB)
Start condition
Start condition
S
S
GX (MIP + MIN)
1
1
BTL: G x RIN
G x RIN
0
0
SLAVE ADDRESS
SLAVE ADDRESS
RHP
SD
SD
SD
SD
SD
1
1
1
1
1
1
0
0
1
1
GX (MIP + MIN)
R/W
R/W
R/W
BTL: G x RIN
0
0
G x LIN
Acknowledge
Acknowledge
from Slave
from Slave
LHP
A
A
SD
SD
SD
SD
SD
D7 D6 D5 D4 D3
D7 D6 D5 D4 D3
Volume Control
Volume Control
settings
settings
CONTROL REGISTERS
CONTROL REGISTERS
Gx (MIP + MIN)
GX (RIN + LIN)
Speaker P/N
D2 D1 D0
D2 D1 D0
G x LIN
Output
Output
Mode settings
Mode settings
SD
SD
SD
SD
SD
Acknowledge
Acknowledge
from Slave
from Slave
A
A
P
P
Stop condition
Stop condition
GX (MIP + MIN)
GX (RIN + LIN)
Mono L/O
SD
SD
SD
SD
SD
SD
TS4956
(1)