Texas Instruments ADS8350EVM-PDK, Руководство пользователя

Страница: 7 / 36

www.ti.com
Digital Interface
3 Digital Interface
Socket strip connector J6 provides the digital I/O connections between the ADS8350EVM board and the
simple capture card board.
Table 3 summarizes the pinout for connector J6.
Table 3. Connector J6 Pinout
Terminal Number Signal Description
J6.2, J6.10, J6.15, J6.16,
GND Ground connections
J6.18
J6.4 EVM PRESENT EVM present, active low
I
2
C bus; used only used to program the U7
J6.11, J6.12 I
2
C™ bus
EEPROM on the EVM board
3.3-V digital supply from simple capture card
J6.13 DVDD
controller board
J6.34 CS Chip select, active low
J6.36 SCLK Serial interface clock
J6.40 SDO_A Serial data output for channel A
J6.42 SDO_B Serial data output for channel B
3.1 Serial Peripheral Interface (SPI)
The ADS8350 digital output is available in SPI-compatible format, which makes interfacing with
microprocessors, digital signal processors (DSPs), and FPGAs easy. The ADS8350EVM offers 47-
Ω
resistors between the SPI signals and connector J6 to aid with signal integrity. Typically, in high-speed
SPI communication, fast signal edges can cause overshoot; these 47-
Ω resistors slow down the signal
edges in order to minimize signal overshoot.
3.2 I
2
C Bus for Onboard EEPROM
The ADS8350EVM has an I
2
C bus to communicate with the onboard EEPROM that records the board
name and assembly date. It is not used in any form by the ADS8350 converter.
7 SBAU218A – April 2014 – Revised October 2014 ADS8350EVM-PDK
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated