Everest Semiconductor

ES8288

Revision 6.0

November 2016

8

16 kHz (MCLK/750)

10111

MCLK

22.0588 kHz (MCLK/544)

10110

MCLK

24 kHz (MCLK/500)

10101

MCLK

32 kHz (MCLK/375)

10100*

MCLK

44.118 kHz (MCLK/272)

10011

MCLK

44.118 kHz (MCLK/272)

10011

MCLK

48 kHz (MCLK/250)

10010

MCLK

48 kHz (MCLK/250)

10010

MCLK

88.235 kHz (MCLK/136)

10001

MCLK

96 kHz (MCLK/125)

10000

MCLK

5

MICRO-CONTROLLER CONFIGURATION INTERFACE

The device supports standard SPI and 2-wire micro-controller configuration

interface. External micro-controller can completely configure the device

through writing to internal configuration registers. Please see section 8 for the

details of configuration register definition.

The identical device pins are used to configure either SPI or 2-wire interface. In

SPI mode, pin CE, CCLK and CDATA function as SPI_CSn, SPI_CLK and

SPI_DIN. In 2-wire mode, pin CE, CCLK and CDATA function as AD0, SCL and

SDA. To select SPI mode, apply high to low transition signal to CE pin.

Otherwise the device will operate in 2-wire interface mode.

5.1

SPI

ES8288 has a SPI (Serial Peripheral Interface) compliant synchronous serial

slave controller inside the chip. It provides the ability to allow the external

master SPI controller to access the internal registers, and thus control the

operations of chip.

All lines on the SPI bus are unidirectional: The SPI_CLK is generated by the

master controller and is primarily used to synchronize data transfer, the

SPI_DIN line carries data from the master to the slave; SPI_CSn is generated

by the master to select ES8288.

The timing diagram of this interface is given in Figure 1. The high to low

transition at SPI_CSn pin indicates the SPI interface selected. Each write

procedure contains 3 words, i.e. Chip Address plus R/W bit, internal register

address and internal register data. Every word length is fixed at 8 bits. The

input SPI_DIN data are sampled at the rising edge of SPI_CLK clock. The

MSB bit in each word is transferred firstly. The transfer rate can be up to 10M

bps.