ES9080 datasheet(38/146 Pages) ESS

38 / 146 page

CONFIDENTIAL ADVANCE INFORMATION 0.4.3

ES9080 Product Datasheet

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

When the ES9080 is powered up and CHIP_EN is pulled “high”, the default I2C address is 0x90/0x98. The I2C address can be changed to

0x92/0x9A by using Register 192 [2], I2C_ADDR. This is useful if 2 ES9080 devices will be used together as they will require separate I2C address

for control.

Order for changing the I2C address:

1) CHIP_EN is pulled high on Device 1, Device 2 is still held in reset

2) I2C_ADDR changed on Device 1 (Address now 0x92)

3) CHIP_EN is pulled high on Device 2.

I2C Slave Interface (Device Address 0x90,0x92)

This interface contains Read/Write and Read-only registers. A system clock must be present.

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.

Read/Write Register Addresses

Registers 0–164 (0x00 – 0xB3) are read/write registers

Read-only Register Addresses

Registers 224 – 255 (0xE0 – 0xFF) are read only registers.

I2C Synchronous Slave Interface (Device Address 0x98,0x9A)

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

When the device is inactive, all peripherals are automatically disabled and all clocks are stopped. A reset can wake the ES9080

Write-only Register Addresses.

Registers 192 – 203 (0xC0 – 0xCB) 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.

ES9080 Datasheet(PDF) 38 Page - ESS Technology,Inc