3980xpi Users Manual - Data I/O Corporation

Commands
� Total Set Size
Specifies the number of virtual devices in the set for device operations. For
example, if you are loading 16-bit wide data from two 8-bit wide devices,
your virtual device still equals one (one 16-bit virtual device). Enter any
number from 1 to 99. Automatic Set Size calculation will be attempted
when any of the following parameters are changed: Device Width, Data
Word Width, Device Block Size or User Data Size. Total Set Size can be
defined by the following equation:
TOTAL SET SIZE
=
� User Data Size
Specifies the hexadecimal size, in bytes, of the data block used to load
from the device to the destination. This value is normally equal to the
device size or to a multiple of the device size for loading a set. If 0 or a
value less than the device size is entered, it is reset to the device size for
the load. User Data Size works with Total Set Size to determine the total
amount of bytes to load from a set of devices.
� Next Operation Begins At
This read-only parameter shows where in user memory the next data byte
will be loaded. This value is calculated from the Data Word Width, Device
Block Size, Memory Begin Address, device width, and next set member
parameters.
Optional Parameters
DEVICE BLOCK SIZE
USER DATA SIZE
DATA WORD WIDTH
DEVICE WIDTH
The Non-default Parameters screen, which contains the preceding
parameters and any default parameters that were changed, is displayed as the
default. The more complex All Parameters screen displays the following
additional parameters. To toggle between the two screens, press F4.
� Memory Begin Address
Specifies the beginning RAM address, in hex, where the first byte of data is
loaded from a device. If you selected a 16-bit device, the Memory Begin
Address must be an even address. The default address is 0.
� Device Begin Address
Specifies the first hex master device address that will be loaded. The
default value is 0.
� Device Block Size
Specifies the size, in hex, of device data used in device operations. After
you select a device, the Device Block Size is set automatically to the device
size and normally does not need to be changed. Also, Device Block Size is
set to a smaller value if the Device Begin Address is nonzero. This
parameter can be changed if desired. Entering a zero sets the Device Block
Size equal to the device size.
3980xpi/3980/3900/2900 User Manual 4-9
0987-1