Texas Instruments CDCEL925PERF-EVM - CDCEL925 Performance Evaluation Module CDCEL925PERF-EVM CDCEL925PERF-EVM Datenbogen
Produktcode
CDCEL925PERF-EVM
EVM Hardware
www.ti.com
NOTE:
J51
→
use this jumper to ground Vddout. In this way, the default functionality for the SDA/S1
and SCL/S2 pins is recalled, and the device can be reprogrammed even though these pins
were set to control pins (S1 and S2). Besides, the device default address is also recalled.
Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40
open).
were set to control pins (S1 and S2). Besides, the device default address is also recalled.
Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40
open).
4.1.1.2
USB Power Supply
In order for the board to be fully supplied via USB, follow the instructions regarding the jumpers’ setup for
both the device core and the output stage. The latter depends on the type of device (CDCE9xx or
CDCEL9xx).
both the device core and the output stage. The latter depends on the type of device (CDCE9xx or
CDCEL9xx).
NOTE:
All EVMs are delivered with the USB power supply as default.
Core Supply Voltage
•
Insert jumper J46 (leave jumper J47 open).
•
Insert jumper J23 and J25, and plug in the USB cable (use a 2.0 USB male B termination).
Output Stage Supply Voltage (Either 3.3 V or 1.8 V)
a) CDCE9XX
→
VDDOUT = 3.3 V
•
Insert jumper J43 (leave J44 and J45 open).
NOTE:
J45
→
use this jumper to ground Vddout. . In this way, the default functionality for the
SDA/S1 and SCL/S2 pins is recalled and the device can be reprogrammed even though
these pins were set to control pins (S1 and S2). Besides, the device default address is also
recalled. Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38,
and J40 open).
these pins were set to control pins (S1 and S2). Besides, the device default address is also
recalled. Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38,
and J40 open).
b) CDCEL9XX
→
VDDOUT = 1.8 V
•
Insert jumper J49 (leave jumper J50 and J51 open).
NOTE:
J51
→
use this jumper to ground Vddout. In this way, the default functionality for the SDA/S1
and SCL/S2 pins is recalled and the device can be reprogrammed even though these pins
were set to control pins (S1 and S2). Besides, the device default address is also recalled.
Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40
open).
were set to control pins (S1 and S2). Besides, the device default address is also recalled.
Set J39 and J33 for SDA and SCL to reprogram the device (leave J32, J34, J38, and J40
open).
4.1.2
Programming Interfaces
The device supports nonvolatile EEPROM programming for easy customized applications. Although preset
to a factory default configuration (see the relevant data sheet), it can be reprogrammed to a different
application configuration. All device settings are programmable through the SDA/SCL bus, a 2-wire serial
interface that works according to the I
to a factory default configuration (see the relevant data sheet), it can be reprogrammed to a different
application configuration. All device settings are programmable through the SDA/SCL bus, a 2-wire serial
interface that works according to the I
2
C standard specification.
Three, free programmable control inputs, S0, S1, and S2, can be used to select different frequencies, or
change the SSC setting for lowering EMI, or other control features like, outputs disable to low, outputs
3-state, power down, PLL bypass, etc.
change the SSC setting for lowering EMI, or other control features like, outputs disable to low, outputs
3-state, power down, PLL bypass, etc.
The device can be programmed externally in two ways:
1. Via the USB cable connected to the PC and to the EVM (in this mode, J39 and J33 are set). TI
Pro-Clock™ software (see section 4) supports the device programming.
2. By an external pattern generator connected to J39 (clock) and J33 (data).
The EVM also offers the opportunity to change the configuration setting of the device by switching the set
of S0, S1, and S2 (see the relevant device data sheet). This can be done by simply inserting and
removing the jumpers by the following description:
of S0, S1, and S2 (see the relevant device data sheet). This can be done by simply inserting and
removing the jumpers by the following description:
6
CDCE(L)9xx Performance Evaluation Module
SCAU022A – July 2007 – Revised July 2010
Copyright © 2007–2010, Texas Instruments Incorporated