ES9842PRO datasheet(56/167 Pages) ESS

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CONFIDENTIAL ADVANCE INFORMATION

ES9842 PRO Product Datasheet

VERSION 0.5

ESS TECHNOLOGY, INC. 109 Bonaventura Drive, San Jose, CA 95134, USA Tel (408) 643-8800 WWW.ESSTECH.COM

The registers for the ES9842 PRO can be accessed either using an I2C or SPI interface.

The MODE pin (pin 3) determines which interface will be used:

• MODE = 1’b0

I2C interface (pull ups on SCL & SDA required)

▪

Pin 25 SDA

▪

Pin 26 SCL

▪

Pin 27 ADDR1

▪

Pin 28 ADDR2

ADDR1 & ADDR2 determine the I2C address

▪

I2C Slave Address = [5’b01000, ADDR2, ADDR1, R/W]

• Possible addresses are 0x40, 0x42, 0x44, 0x46 for I2C Slave Address

▪

I2C Synchronous Slave Address = [5’b01001,ADDR2,ADDR1,R/W]

• Possible addresses are 0x48, 0x4A, 0x4C, 0x4E for I2C Synchronous Slave

Address

• MODE = 1’b1

SPI interface

Different SPI commands allow for writing to write only registers, or write and read from other

registers

The SPI Slave interface can be accessed using the Pins 25-28

• Pin 25 MOSI

• Pin 26 SCLK

• Pin 27 SS

• Pin 28 MISO

I2C Slave

Address

I2C

Synchronous

Slave Address

ADDR2

ADDR1

0x40

0x48

0x42

0x4A

0x44

0x4C

0x46

0x4E

Table 29 - I2C addresses

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