United Electronic Industries DN-SL-514 Series, User Manual

DNx-SL-514 Synchronous Serial Interface Board

Chapter 1

9

Introduction

May 2018

www.ueidaq.com



508.921.4600 

© Copyright 2018



United Electronic Industries, Inc.

1.7.2

Serial Port 
Configuration 
Options

Baud rate

. Baud rates are customizable per channel. The master and slave port 

on each channel runs the same baud rate (refer to 

T

 in 

Figure 1-3

).

Data word length

. The number of bits in the data word can be customized by 

the user. Supported word lengths are 3 bits (MSB, MSB-1, LSB) to 32 bits. 

Figure 1-4  Example of Debouncing and Tv time Delays

Debouncing

. Debouncing circuits can be enabled on each master and slave 

port on each channel. Debouncing is available on both clock and data signals.

T

v

 time delay

. Tv represents the time between the rising edge of the clock and 

the transmission of a data bit (on the slave side) or the latching of data bits (on 
the receive/master side). The 

tv

 delay can be programmed independently per 

channel. 

The 

m_tv

 or 

s_tv

 parameter can be programmed as 0 to 255 number of 66 

MHz clocks.

T

p

 time delay

. Tp represents the time between the rising edge of the clock after 

the LSB transmission and the falling edge of the first clock of the next data word 
(refer to 

tp

 in 

Figure 1-3

).

The 

m_tp

 or 

s_tp

 parameter can be programmed a 32-bit number of 66 MHz 

clocks.

T

m

 time delay

. The transfer timeout delay, also called the monoflop time, 

represents the time delay between the DataOut pin driving low after the LSB is 
transmitted and the time the DataOut drives high, signifying the port has entered 
an IDLE state (refer to 

tm

 in 

Figure 1-3

).

The 

m_tm

 or 

s_tm

 parameter can be programmed as up to 65535 number of 66 

MHz clocks. (The minimum tm is based on your system and cannot be less than 
half the baud rate, T/2).

Termination resistors

. Termination can be enabled or disabled per channel 

(refer to Section 1.7.5 for more information).

Trigger

. Master and slave ports can set a data transfer trigger condition per 

channel: start immediately as soon as data is in the FIFO buffer, or wait for a 
global trigger.

Timestamps

. Master ports can latch a timestamp to be stored with each 

received serial data word (up to 1024 serial data words and 1024 accompanying 
timestamps).

t

v

= data delay time

DATAout

CLKin

MSB

programmable 

s_debounce

programmable 

s_tv

t

v

NOTE: Total tv time will be 
programmed debounce value 
plus programmed s_tv value.