Evaluation Board
User Guide
UG-XXX
Rev. A | Page 13 of 14
DEBUG
To access the Debug window, select
Debug
from the tab selection.
Figure 14. Debug Window
The Debug window gives you complete direct access to the
register map as well as control of many external pins. The
Debug window is intended for debugging issues with the
AD9915. It can be used for all programming, but is not user-
friendly; this may result in improper programming of reserved
bits.
DROVR
alerts when ramp generation is over. The ramp
direction (rising or falling) is externally controlled by the
DRCTL
. Logic 0 causes the DRG to ramp with a negative
slope, whereas logic 1 causes the DRG to ramp with a positive
slope.
DRHOLD
allows the user to suspend the ramp generator
in its present state. When this is set to logic 1, the DRG is
stalled at its last state; otherwise, the DRG operates normally.
EXTAMPCTL
sets the OSK feature on either manual or
automatic mode.
EXTPDCTL
is a flag input that would initiate
the programmed power-down mode.
RESET
is the master reset
that clears all memory elements and sets registers to default
values.
IOUPDATE
transfers the contents of the I/O buffers to the
corresponding internal registers.
PS0
,
PS1
, and
PS2
control
the profile register pins. See the AD9915 data sheet for the
logic to control the profiles via the external pins.
SYNC IO
controls the SYNCIO pin.This pin is used to reset
the serial port.
The
REGISTER MAP
shows the values of all the registers in
AD9915. Note that there are two sources (buffer) for the
register map; software and hardware. Using the
Software
source allows to display the values that reflects the current user
interface settings. On the other hand, the
Hardware
source
displays the register values that are written to, or read from the
part which requires a
Refresh
.
