NAU8812EVB Nuvoton Technology Corporation of America, NAU8812EVB Datasheet - Page 50

• Manufacturer Part Number: NAU8812EVB
• Description: BOARD EVAL FOR NAU8812
• Manufacturer: Nuvoton Technology Corporation of America
• Series: emPowerAudio™r

Specifications of NAU8812EVB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A Read operation consists of a three-byte instruction followed by one or more Data Bytes. The master initiates the
operation issuing the following sequence: a START condition, device address byte with the R/W bit set to “0”, a
control address byte, a second START condition, and a second device address byte with the R/W bit set to “1”.
After each of the three bytes, the NAU8812 responds with an ACK. Then the NAU8812 transmits Data Bytes as long
as the master responds with an ACK during the SCLK cycle following the ninth bit of each byte. The master
terminates the read operation (issuing a STOP condition) following the last bit of the last Data Byte.
After reaching the memory location 7Fh the pointer “rolls over” to 00h, and the device continues to output data for
each ACK received.
emPowerAudio
Datasheet Revision 2.0
SCLK
SDIO
12.9.2.3.
SDIO
SCLK
S
T
A
R
T
™
0
S
T
A
R
T
0
0
Device Address = 34h
1
2-WIRE Read Operation
0
Device Address = 34h
1
1
0
1
1
0
1
0
0
0
0
Figure 30: 2-Wire Read Sequence
A
C
K
Figure 29: Byte Write Sequence
A
C
K
A6
0
A6 A5 A4 A3 A2 A1 A0 0
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Control Register Address
A5
0
Control Register Address
0
A4
0
A3
0
A2
16-bit Data
0
A1
0
A0
D8
D8
A
C
K
A
C
K
D
7
A
C
K
S
T
A
R
T
D6 D5 D4 D3 D2 D1 D0
D7
0
D6
2
0
ND
9-bit Data Byte
D5
Device Address = 35h
1
D4
1
D3
0
1
D2
NAU8812
0
D1
January 2011
A
C
K
1
D0
A
C
K
S
T
O
P
A
C
K
S
T
O
P