CDB61310 Cirrus Logic, Inc., CDB61310 Datasheet - Page 6

• Manufacturer Part Number: CDB61310
• Description: T1/e1 Line Interface Units
• Manufacturer: Cirrus Logic, Inc.

10. CDB61310 SOFTWARE
The CDB61310 can be configured in the host/soft-
ware mode using the application CDB61310.EXE
supplied with the board. This application allows the
user to access all of the user programmable regis-
ters in the device. The program supplied with the
board runs under Windows 95 and 98. A special
version for Windows NT is available from the fac-
tory. Contact your nearest Cirrus Logic representa-
tive for details.
10.1 Configure PC
This function allows the user to set the address of
the PC parallel port. The selection depends on the
configuration of the user’s PC. The Plug and Play
(PnP) function of the operating system determines
this address every time the PC is powered up, but it
normally won’t change the printer port address un-
less the configuration of the hardware has changed.
There are two ways to determine the address of the
parallel port: the safe method and the fast method.
The safe method is to double click on the My Com-
puter icon on the desktop, double click on Control
panel, then Double click on System. Select the De-
vice Manager tab, then with “View devices by
type” selected in the window that pops up, double
click on Ports (COM & LPT). Click on the Printer
Port icon that corresponds to the port that is con-
nected to the CDB61310 evaluation board, then se-
lect Properties. On the Properties window, select
the Resources tab, then read the I/O address in the
Input/Output Range field. This is the address range
to select for the CDB61310.
The fast method is to try the ports one by one, going
to the Configure Part window every time to see
which one allows the user to read from the device.
when the wrong address is selected, the bit fields in
this window will read either all zeroes or all ones.
Going to the Configure Part window automatically
issues a read command to the device, which will
cause unpredictable results if the selected LPT port
is connected to some device other than a
6
CDB61310 evaluation board. Before using this
method, the user is advised to disconnect all other
devices from the LPT ports.
10.2 Configure Part
The Configure_Part pull down menu has two op-
tions. The first is Control Register Configuration,
which gives access to the control and status regis-
ters. The second is Transmitter RAM Configura-
tion, which configures the Arbitrary Waveform
Generator (AWG). See the CS61310 data sheet for
information on programming these registers.
10.3 Control Register Configuration
Selecting Control Register Configuration pulls up
the register configuration window and automatical-
ly issues a read command to the CDB61310; the
user must make sure that the software is configured
to use the proper LPT port before this option is se-
lected (see Configure PC above).
The register configuration window is shown in Fig-
ure 1 on page 7. The bits in the Control Registers
(CNTL REG 1, CNTL REG 2, CNTL REG 3) are
written by checking the box opposite to the individ-
ual bits in the "Write" columns, then clicking on the
"Write Registers" button. This writes the displayed
data to all three control registers, then automatical-
ly reads the control and status registers and displays
the results in the "Read" columns. Since Control
Register 1 is effectively a control register when it is
written and a status register when it is read, the read
status is decoded and displayed in the Read Status
window.
The registers can also be read by clicking on the
"Read Registers" button. All five registers are read
when this command is selected.
The LATN REG register shows the current setting
of the gain equalizer.
10.4 Transmitter Ram Configuration
When this command is selected, the software pops
up a window which displays the contents of the
CDB61310
DS440DB2