Datasheet

PGA400 EVM User Guide
TI CONFIDENTIAL – NDA Restrictions
Page 36 of 50
7.6.4 Send Sync
The “Send Sync” button will send the required preliminary “Sync” pulse to flush the contents of
the OWI transceiver shift buffer.
7.6.5 Write/Read Tab
The bottom portion of the main OWI tab is divided between performing simple OWI writes and
reads and performing OWI burst write/reads. An image of the “Write/Read” tab can be seen in
the previous figure and a description of the buttons can be found below.
7.6.5.1 Memory Space Selection Box
The currently selected Memory Space in the “Memory Space Selection Box” will be used to form
the correct packet when an OWI write or read is performed using the Write/Read buttons on the
“Write/Read” tab.
7.6.5.2 Address Text Box
The “Address Text Box” is used to enter the address that the user desires to write/read from
when using the Write/Read buttons.
7.6.5.3 Data Text Box
The “Data Text Box” is used to enter the data that the user desires to write/read from when using
the Write/Read buttons.
7.6.5.4 Write OWI
The “Write OWI” button will collect information from the “Memory Space Selection Box,” the
“Address Text Box,” and the “Data Text Box” and then form the appropriate packet to write the
data into the selected address in the correct memory space.
7.6.5.5 Send Read Init
The “Send Read Init” button will collect information from the “Memory Space Selection Box,” and
the “Address Text Box,” and then form the appropriate packet to send in the “Read Init”
command when reading from a selected address in the correct memory space.
7.6.5.6 Send Read Response
The “Send Read Response” button will send the “Read Response” command to the PGA400-Q1
that will be followed by the data that was requested in the “Read Init” command.
7.6.5.7 Read USART
The “Read USART” button will read out the contents of the TI-GER USART buffer. Data is
shifted out of the FIFO buffer when the button is pressed and then displayed in the textbox on
the right side of the “Write/Read” tab. Since the OWI always works in loop-back mode, the
results of any OWI writes can be seen by reading the USART after a write is performed.