Post Closed as "Duplicate" by Majenko, placeholder, Daniel Grillo, Blup1980, Chetan Bhargava

Cascading several SPI devices

occurred Jul 22, 2014 at 19:42

fix LTC1285 description to match linear.com data sheet

Source Link

edit approved Jul 22, 2014 at 10:27

15.1k
1
35
56

I need to connect 3 devices with SPI in a daisy chain configuration.1 master 2 slaves. the first slave is typically connected to the master: SCK-SCK MOSI-MOSI CS-CS The second slave on chain have no MOSI input, only SCK,MISO and CS. I can connect this slave device to the master (MISO) but I interrupt the chain beetween the two slaves. enter image description here The three device are:

Master: ATmega32 (MCU) http://www.atmel.com/images/doc2503.pdf
Slave 1: MCP23S17 (differential ADC)
Slave 2: LTC1285 (163V 12-Bit Ibit A/O ExpanderD Converter) http://www.farnell.com/datasheets/1575635.pdf

Is it possible to connect theese 3 devices in a daisy chain configuration? Thanks for your help!

Source Link

asked Jul 22, 2014 at 9:14

Danny

379
1
8

Problems connecting differential ADC to SPI chain

I need to connect 3 devices with SPI in a daisy chain configuration.1 master 2 slaves. the first slave is typically connected to the master: SCK-SCK MOSI-MOSI CS-CS The second slave on chain have no MOSI input, only SCK,MISO and CS. I can connect this slave device to the master (MISO) but I interrupt the chain beetween the two slaves. enter image description here The three device are:

Master: ATmega32 (MCU) http://www.atmel.com/images/doc2503.pdf
Slave 1: MCP23S17 (differential ADC)
Slave 2: LTC1285 (16-Bit I/O Expander) http://www.farnell.com/datasheets/1575635.pdf

Is it possible to connect theese 3 devices in a daisy chain configuration? Thanks for your help!

Stack Exchange Network

Return to Question

Problems connecting differential ADC to SPI chain