National Semiconductor
DAC161P997EVAL User’s Guide
2011 National Semiconductor Corporation Page 8 of 11 Rev: 0.00
“Stimulus Config” Tab
Check the “SWIF Continuous mode”. Then go to “DAC161P997 Data” tab….
Details for later:
Control
Description of Functionality
SWIF Baud Rate
Sets the Bud rate of the SWIF link. New entry must be followed by <ENTER> key.
NOTE: Update stops the SWIF activity. Re-start SWIF with any of the SEND buttons in
other tabs
SWIF Continuous Mode
When checked SPIO4 will continue looping through the content of the SWIF data buffer
(Continuous Mode) until STOP button is clicked
When cleared SPIO4 sends the content of the SWIF data buffer only once (One Shot
Mode )and follows it with repeated Intra-Frame symbol until STOP is clicked
NOTE: Updating this control stops SWIF if already active. Re-start SWIF with any of the
SEND buttons in other tabs
Set Intra-Frame Symbol=D
When checked SPIO4 sets the Intra-Frame Symbol to D (50% duty cycle). This setting
keeps the link active at all times, even though no meaningful data is being sent.
When cleared SPIO4 sets the Intra-Frame Symbol to LO (0% duty cycle).
NOTE: Intra-Frame Symbol exists only in the context of the “SWIF One Shot Mode”
NOTE: Updating this control stops SWIF if already active. Re-start SWIF with any of the
SEND buttons in other tabs
Set ERRLVL=HI
Instructs SPIO4 board to set HI the ERRLVL input to DAC161P997. In the default set-up
that functionality is not available. To enable it a jumper should be installed connecting
points marked with “A” on the DAC161P997 Test Board
