FLEX 10K Embedded Programmable Logic Family Data Sheet
Figure 32. I
vs. Operating Frequency (Part 3 of 3)
CCACTIVE
EPF10K250A
3,500
3,000
2,500
2,000
I
Supply
CC
Current (mA)
1,500
1,000
500
0
20
40
60
80
100
Frequency (MHz)
The FLEX 10K architecture supports several configuration schemes. This
section summarizes the device operating modes and available device
configuration schemes.
Configuration &
Operation
See Application Note 59 (Configuring FLEX 10K Devices) for detailed
descriptions of device configuration options, device configuration pins,
and for information on configuring FLEX 10K devices, including sample
schematics, timing diagrams, and configuration parameters.
f
Operating Modes
The FLEX 10K architecture uses SRAM configuration elements that
require configuration data to be loaded every time the circuit powers up.
The process of physically loading the SRAM data into the device is called
configuration. During initialization, which occurs immediately after
configuration, the device resets registers, enables I/O pins, and begins to
operate as a logic device. The I/O pins are tri-stated during power-up,
and before and during configuration. Together, the configuration and
initialization processes are called command mode; normal device operation
is called user mode.
SRAM configuration elements allow FLEX 10K devices to be reconfigured
in-circuit by loading new configuration data into the device. Real-time
reconfiguration is performed by forcing the device into command mode
with a device pin, loading different configuration data, reinitializing the
device, and resuming user-mode operation.
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