ES9842PRO datasheet(57/167 Pages) ESS

57 / 167 page

VERSION 0.5

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

ES9842 PRO Product Datasheet

I2C Slave Interface (Device Address 0x40, 0x42, 0x44, 0x46)

This interface contains Read/Write and Read-only registers. A system clock must be enabled through the write-only

registers to read/write these registers.

Multi-byte registers must be written from LSB to MSB. Data is latched when MSB is written.

Multi-byte registers must be read from LSB to MSB. Data is latched when LSB is read.

MSB is always stored in the highest register address. Testing

Read/Write Register Addresses

Registers 0–179 (0x00 – 0xB3) are read/write registers.

Read-only Register Addresses

Registers 224 – 253 (0xE0 – 0xFD) are read only registers.

I2C Synchronous Slave Interface (Device Address 0x48, 0x4A, 0x4C, 0x4E)

This interface contains Write-only registers. These registers can be written even when there is no system clock present.

These registers must be written to to enable read and write access to the rest of the registers.

When the device is inactive, all peripherals are automatically disabled and all clocks are stopped. An interrupt or a reset

can wake the ES9842 PRO

Write-only Register Addresses

Registers 192 – 194 (0xC0 – 0xC2) are write only registers.

Multi-Byte Registers

Multi-byte registers must be written from LSB to MSB. Data is latched when MSB is written.

MSB is always stored in the highest register address.

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