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Serial Interface Control
setting for the EVM is parallel interface, where the RESET pin is tied to high (AVdd) through JP12. The
interface includes six pins: SCLK, SEN, SDATA, DFS, and MODE plus a RESET pin. The detail functions
of these pins are described in the data sheet. On the EVM, these control pins are connected to jumpers
JP9, JP11, J12, and J1 to J3.
function of each setting, see the data sheet.
JP12 (RESET)
JP11 (SDATA)
JP9 (SEN)
Table 4. Jumper Setting for Control Pins SEN, DFS, and MODE at Parallel Interface
J1 (SEN: short 1 to 2 on JP9)
J2 (DFS)
J3 (MODE)
Table 5. Jumper Setting for Control Pins SDATA and SCLK at Parallel Interface
JP11 (SDATA)
SCLK
3
Serial Interface Control
For serial interface access, SEN, SDATA, and SCLK function as serial interface pins and are used to
access the internal registers of the ADC. Their relative jumper settings are shown in Table 3. The pins
DFS and MODE must be set to GND through jumpers J2 (short 1 to 2) and J3 (short 1 to 2) at serial
interface control. The serial interface control is implemented by an ADC SPI control software installed on
the PC and a USB port (J17) on the EVM. For evaluating the ADC, it is unnecessary for users to use a
serial interface. Users only need the serial interface software when the desired feature is inaccessible by
the parallel interface mode.
3.1
Installing the AD SPI Control Software
The ADC SPI control software can be installed on a personal computer by running the setup.exe file
located on the CD. This file installs the graphical user interface (GUI) along with the USB drivers needed
to communicate to the USB port that resides on the EVM. After the software is installed and the USB
cable has been plugged in for the first time, the user is prompted to complete the installation of the USB
drivers. When prompted, allow the Windows™ operating system to search for device drivers. It
automatically finds the TI ADC SPI Interface drivers.
button to select the ADS556x device.
Note:
Before plugging in the USB cable for the first time, install the TI ADC SPI software. The
software installs the necessary drivers for USB communication.
4
ADS5560/62EVM
Table 3
to
Table 5
describe all possible settings of these jumpers. For the
Table 3. Jumper Setting for Control Interface
Parallel interface (default setting)
Short 1 to 2
Floating 2 (normal) or Short 1 to 2
Short 1 to 2
AVdd
(5/8)AVdd
Short 7 to 8
Short 5 to 6
Short 7 to 8
Short 5 to 6
Short 7 to 8
Short 5 to 6
3.3 V
GND (default setting)
Short 2 to 1
Pin 2 is float
Float
Figure 1
Serial interface
Short 2 to 3
Short 2 to 3
Short 2 to 3
(3/8)AVdd
GND
Short 3 to 4
Short 1 to 2
Short 3 to 4
Short 1 to 2
Short 3 to 4
Short 1 to 2
shows the SPI interface. Click the right top
SLAU260 – December 2008
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