MAX97000EVKIT+ Maxim Integrated Products, MAX97000EVKIT+ Datasheet - Page 29

• Manufacturer Part Number: MAX97000EVKIT+
• Description: KIT EVALUATION FOR MAX97000
• Manufacturer: Maxim Integrated Products

Specifications of MAX97000EVKIT+

• Description/function: Audio Amplifiers
• Operating Supply Voltage: 2.7 V to 5.5 V
• Product: Audio Development Tools
• Supply Current: 1 A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MAX97000

The acknowledge bit (ACK) is a clocked 9th bit that
the MAX97000 uses to handshake receipt each byte
of data when in write mode (Figure 9). The MAX97000
pulls down SDA during the entire master-generated 9th
clock pulse if the previous byte is successfully received.
Monitoring ACK allows for detection of unsuccessful
data transfers. An unsuccessful data transfer occurs
if a receiving device is busy or if a system fault has
occurred. In the event of an unsuccessful data transfer,
the bus master will retry communication. The master pulls
down SDA during the 9th clock cycle to acknowledge
receipt of data when the MAX97000 is in read mode. An
Figure 9. Acknowledge
Figure 11. Writing n-Bytes of Data to the MAX97000
Figure 10. Writing 1 Byte of Data to the MAX97000
S
ACKNOWLEDGE FROM MAX97000
S
SLAVE ADDRESS
Speaker and Class H Headphone Amplifier
SLAVE ADDRESS
ACKNOWLEDGE FROM MAX97000
R/W
Audio Subsystem with Mono Class D
0
SDA
SCL
A
CONDITION
R/W
ACKNOWLEDGE FROM MAX97000
START
0
REGISTER ADDRESS
A
Acknowledge
1
ACKNOWLEDGE FROM MAX97000
REGISTER ADDRESS
28
ACKNOWLEDGE FROM MAX97000
A
B7 B6
acknowledge is sent by the master after each read byte
to allow data transfer to continue. A not-acknowledge is
sent when the master reads the final byte of data from
the MAX97000, followed by a STOP condition.
A write to the MAX97000 includes transmission of a
START condition, the slave address with the R//W bit
set to 0, 1 byte of data to configure the internal register
address pointer, 1 or more bytes of data, and a STOP
condition. Figure 10 illustrates the proper frame format
for writing 1 byte of data to the MAX97000. Figure 11
illustrates the frame format for writing n-bytes of data to
the MAX97000.
NOT ACKNOWLEDGE
B5 B4
DATA BYTE 1
ACKNOWLEDGE
1 BYTE
B3 B2
ACKNOWLEDGMENT
CLOCK PULSE FOR
REGISTER ADDRESS POINTER
AUTOINCREMENT INTERNAL
B1 B0
A
9
B7
A
B6
ACKNOWLEDGE FROM MAX97000
ACKNOWLEDGE FROM MAX97000
B5
B7 B6
DATA BYTE
B4
1 BYTE
B5 B4
DATA BYTE n
B3
1 BYTE
B2
REGISTER ADDRESS POINTER
B3 B2
AUTOINCREMENT INTERNAL
Write Data Format
B1
B1 B0
B0
A
A
P
P
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