Rainbow Electronics MAX9860 - Manual (Page 34)

MAX9860
The third byte sent to the MAX9860 contains the data
that is written to the chosen register. An acknowledge
pulse from the MAX9860 signals receipt of the data byte.
The address pointer autoincrements to the next register
address after each received data byte. This autoincre-
ment feature allows a master to write to sequential regis-
ters within one continuous frame. Figure 10 illustrates
how to write to multiple registers with one frame. The
master signals the end of transmission by issuing a
STOP condition. Register addresses greater than 0x10
are reserved. Do not write to these addresses. Read Data Format
Send the slave address with the R/W bit set to 1 to initi-
ate a read operation. The MAX9860 acknowledges
receipt of its slave address by pulling SDA low during
the 9th SCL clock pulse. A START command followed
by a read command resets the address pointer to reg-
ister 0x00.
The first byte transmitted from the MAX9860 is the con-
tents of register 0x00. Transmitted data is valid on the
rising edge of SCL. The address pointer autoincre-
ments after each read data byte. This autoincrement
16-Bit Mono Audio Voice Codec
34 ______________________________________________________________________________________
SCL
SDA
S Sr P
Figure 7. START (S), STOP (P), and REPEATED START (Sr) Conditions
1
SCL
START
CONDITION
SDA
28 9
CLOCK PULSE FOR
ACKNOWLEDGMENT
ACKNOWLEDGE
NOT ACKNOWLEDGE
Figure 8. Acknowledge
A 0 SLAVE ADDRESS REGISTER ADDRESS DATA BYTE
ACKNOWLEDGE FROM MAX9860
R/W 1 BYTE
AUTOINCREMENT INTERNAL
REGISTER ADDRESS POINTER
ACKNOWLEDGE FROM MAX9860
ACKNOWLEDGE FROM MAX9860
B1 B0 B3 B2 B5 B4 B7 B6
S A A P
Figure 9. Writing One Byte of Data to the MAX9860