NAU8812EVB Nuvoton Technology Corporation of America, NAU8812EVB Datasheet - Page 48

• 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

The 32-bit read operation is a four-byte operation with 2-bytes of data. The transmission starts with the falling edge
of the CSb line and ends with the rising edge of the CSb. The host micro-controller sends device address, control
register address byte following 2 bytes of data. The device can receive more than one byte of data by continuously
clocking. Note after reaching the maximum address the internal pointer “rolls over” to address 0x00 (hex). The
device will output a dummy byte [0x00] when locations without register assignments are within the sequence.
The NAU8812 supports a bidirectional bus oriented protocol. The protocol defines any device that sends data onto
the bus as a transmitter and the receiving device as the receiver. Therefore, the 2-Wire operates as slave interface.
All communication over the 2-Wire interface is conducted by sending the MSB of each byte of data first.
emPowerAudio
Datasheet Revision 2.0
CBb/GPIO
12.9.2.
SCLK
SDIO
SO
12.9.1.3.
™
CBb/GPIO
0
2-WIRE Serial Control Mode (I
0
SCLK
SDIO
Device Address = 20h
1
0
Figure 24: Register Read operation through a 32-bit SPI Interface
0
Figure 23: Register Write operation using a 24-bit SPI Interface
32-bit Read Operation
0
0
0
0
0
Device Address = 10h
0
A6
1
A5 A4 A3 A2 A1 A0
Control Register
0
Address
0
2
Page 48 of 109
C Style Interface)
0
0
A6 A5 A4 A3 A2 A1 A0 D8
0
0
Control Register
Address
0
0
Data Byte 2
0
0
0
0
D7
D8
D6 D5 D4 D3 D2 D1 D0
D7
9-bit Data Byte
D6 D5 D4 D3 D2 D1 D0
Data Byte 1
NAU8812
January 2011