UCD3138064RMHT datasheet(40/91 Pages) TI1

40 / 91 page

Vdd

I BIAS

To ADC Mux

On/Off Control

AD00,

AD01

Resistor to

set PMBus

Address

UCD3138064

SLUSB72B – MARCH 2013 – REVISED SEPTEMBER 2014

www.ti.com

The user can allocate 2 pins of the 12-bit ADC input channels, AD_00 and AD_01, for PMBus address

decoding. At power-up the device applies IBIAS to each address detect pin and the voltage on that pin is

captured by the internal 12-bit ADC.

Figure 6-17. PMBUS Address Detection Method

PMBus/I2C address 0x7E is a reserved address and should not be used in a system using the UCD3138x.

This address is used for manufacturing test.

6.3.6.3

SPI

The SPI is a high-speed synchronous serial input/output port that allows a serial bit stream of programmed

length (1 to 16 bits) to be shifted into and out of the device at a programmed bit-transfer rate. The SPI is

normally used for communication between the UCD3138x and external peripherals. Typical applications

include an interface to external I/O or peripheral expansion via devices such as shift registers, display

drivers, SPI EPROMs and analog-to-digital converters. The SPI allows serial communication with other

SPI devices through a 3-pin or 4-pin mode interface. The SPI typically is configured as a master for

communicating to external EEPROM.

Detailed Description

Submit Documentation Feedback

Product Folder Links: UCD3138064

UCD3138064RMHT Folha de dados(PDF) 40 Page - Texas Instruments