AD9888/PCB Analog Devices Inc, AD9888/PCB Datasheet - Page 2

• Manufacturer Part Number: AD9888/PCB
• Manufacturer: Analog Devices Inc

Specifications of AD9888/PCB

• Lead Free Status / Rohs Status: Not Compliant

EVAL-AD9888EB
SETUP SOFTWARE
The Display Electronics Product Line (DEPL) evaluation soft-
ware is a Visual Basic® program that requires Windows® 95 or
newer. The software comes on a self-installing CD-ROM that is
included with the evaluation board. When installing the soft-
ware, always use the most recent Windows files (e.g., .dll or
.ocx) if prompted by the install software (these files may already
be on your system). The AD9888 register setup screen shown in
Figure 2 is displayed at program execution after installation.
The DEPL evaluation software can be used to control any DEPL
AD988x device. It also includes the display interface board
configuration software and a PLL divisor calculator.
AD9888 SOFTWARE CONTROL
To select the AD9888 as the DEPL evaluation software’s target
device, select AD9888 from the Device pull-down menu. From
the AD9888 register setup screen (shown in Figure 2), the user
can control every bit within the AD9888. A detailed, bit-by-bit
functional description is provided in the AD9888 Data Sheet.
Unless Load Register On Change is clicked, the user must click
Figure 2. AD9888 Register Setup Screen
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the Load button at the top of the window in order to update the
registers. If Load Registers on Change is checked, the
appropriate register is updated as soon as any change is made in
the window. There are three tabs within this control window
that enable the selection of register groups to be displayed. The
selections are: 00–0F, 10–14, or 15. Click the appropriate tab to
view and/or control the desired register.
PLL Settings
The PLL settings are contained in Registers 01h to 04h. The PLL
Divisor setting (12 bits) can be set bit-by-bit (the value toggles
when clicking on the bit), by setting a value (in decimal) for
Registers 01h and 02h, by setting the 12-bit value (in decimal),
or by moving the control bar right or left to increase or decrease
the value. When changing the value using one of these methods,
the change is reflected in the other three. Both registers are
written to at the same time to avoid discontinuities in the 12-bit
setting. The VCO Range and Charge Pump settings in Register
03h can be set bit-by-bit, by register, or by pull-down menu
selection. The 5-bit Phase Adjust in Register 04h can be altered
in the same manner as the PLL Divisor.