AS3693B

austriami crosyst ems

www.austriamicrosystems.com

Revision 1.21 / 2011-09-30

19 - 32

7.7 Device address setup

The I2C and SPI – Device address can be set via PIN ADDR1 and ADDR2. The AS3693B offers 31 I2C or 32

SPI addresses, which can be set via external resistor. ADDR2 bit 2 decides if I2C or SPI interface is used.

Digital Registers

PWM - Generator

ADDR1

AS3693

Flexible 6- Bit Address Programming

with 2 external resistors.

Digital

6 Bit I2C ADDRESS

ADDR2

ADDR1

ADC

R1

R2

Table 13– Device Address

Device Adress Setup:

I2C ADDRESS

I2C ADDRESS Options

Bit

Bit Name

Default

Access

Description

2:0

Device ADDR1

000

R

Lower 3 bits of device address

000 open

Note: don’t use address 00h

001 320k

010 160k

011 80k

100 40k

101 20k

110 10k

111 0

5:3

Device ADDR2

000

R

Upper 3 bits of device address

000 open Note: activates I2C - mode

001 320k

Note: activates I2C - mode

010 160k

Note: activates I2C - mode

011 80k

Note: activates I2C - mode

100 40k

Note: activates SPI - mode

101 20k

Note: activates SPI - mode

110 10k

Note: activates SPI - mode

111 0

Note: activates SPI – mode

7.7.1 I2C Device Address setup

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

0

0 (ADDR2<2>)

ADDR2<1>

ADDR2<0>

ADDR1<2>

ADDR1<1>

ADDR1<0>

R/W

7.7.2 SPI Device Address setup

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

0

0

1 (ADDR2<2>)

ADDR2<1>

ADDR2<0>

ADDR1<2>

ADDR1<1>

ADDR1<0>