MAX9768EVKIT+ Maxim Integrated Products, MAX9768EVKIT+ Datasheet - Page 17

• Manufacturer Part Number: MAX9768EVKIT+
• Description: EVALUATION KIT FOR MAX9768
• Manufacturer: Maxim Integrated Products

Specifications of MAX9768EVKIT+

• Amplifier Type: Class D
• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 10W x 1 @ 8 Ohm
• Voltage - Supply: 4.5 V ~ 14 V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: MAX9768
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 3. Slave Address Block
Table 4. Slave Address
A write to the MAX9768 includes transmission of a
START condition, the slave address with the R/W bit set
to 0 (see Table 3), one byte of data to the command
register, and a STOP condition. Figure 6 illustrates the
proper format for one frame.
The command register is used to control the volume
level of the speaker amplifier. The two MSBs (D7 and
D6) should be set to 00 to choose the speaker register.
V5–V0 is the volume control data that will be written into
the addresses register to set the volume level (see
Tables 5 and 6).
For a write byte operation, the master sends a single byte
to the slave device (MAX9768). This is done as follows:
1) The master sends a start condition.
2) The master sends the 7-bit slave ID plus a write bit
3) The addressed slave asserts an ACK on the data
4) The master sends 8 data bits.
5) The active slave asserts an ACK (or NACK) on the
6) The master generates a stop condition.
SA7 (MSB)
ADDR2
(low).
line.
data line.
1
0
0
1
1
______________________________________________________________________________________
ADDR1
SA6
0
0
1
0
1
SA5
SLAVE ADDRESS
0
Write Data Format
Volume Control
1001001_
1001010_
1001011_
Disabled
Amplifier with Volume Control
SA4
10W Mono Class D Speaker
1
Figure 5. Acknowledge
Figure 6. Write Data Format Example
SCL
SDA
WRITE BYTE FORMAT
SA3
S
CONDITION
0
START
SLAVE ADDRESS:
EQUIVALENT TO CHIP-
SELECT LINE OF A 3-
WIRE INTERFACE.
SLAVE ADDRESS
7 bits
1
ADDR2
SA2
2
WR
0
ACK
ADDR1
NOT ACKNOWLEDGE
DATA BYTE: GIVES A COMMAND.
SA1
ACKNOWLEDGE
8 bits
DATA
ACKNOWLEDGMENT
8
CLOCK PULSE FOR
SA0 (LSB)
9
ACK
R/W
P
17