ES9826 datasheet(44/88 Pages) ESS

44 / 88 page

ES9826 Datasheet

VERSION 0.1.2

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

ES9826 features two different register interfaces. There is a standard I2C slave interface, and a synchronous I2C

slave interface. The standard I2C slave interface requires a system clock present through ACLK or from the PLL to

read and write registers. The synchronous I2C slave interface does not require a system clock, and allows for write-

only configuration of the PLL registers to create a system clock from some reference clock (through DATA_CLK, or

the ACLK pin).

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

Read/Write Registers

Registers 0 – 80 (0x00 – 0x50) are read/write registers.

Read-only Registers

Registers 224 – 241 (0xE0 – 0xF1) are read only registers.

Synchronous I2C 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.

When CHIP_EN is 0, all peripherals are automatically disabled, and all clocks are stopped.

Write-only Registers

Registers 192 – 206 (0xC0 – 0xCE) are write only registers.

Multi-Byte 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.

ES9826 Datasheet(PDF) 44 Page - ESS Technology,Inc