XC4VFX140 XILINX [Xilinx, Inc], XC4VFX140 Datasheet - Page 23

• Manufacturer Part Number: XC4VFX140
• Description: Platform Flash In-System Programmable Configuration PROMS
• Manufacturer: XILINX [Xilinx, Inc]

pull-up resistor is used, but refer to the appropriate FPGA
data sheet for the recommended DONE pin pull-up value. If
the DONE circuit is connected to an LED to indicate FPGA
configuration is complete, and is also connected to the
PROM CE pin to enable low-power standby mode, then an
Table 11: Truth Table for XCFxxS PROM Control Inputs
Table 12: Truth Table for XCFxxP PROM Control Inputs
DS123 (v2.9) May 09, 2006
Notes:
1.
2.
Notes:
1.
2.
3.
4.
5.
OE/RESET
OE/RESET
X = don’t care.
TC = Terminal Count = highest address value.
X = don’t care.
TC = Terminal Count = highest address value.
For the XCFxxP with Design Revisioning enabled, EA = end address (last address in the selected design revision).
For the XCFxxP with Design Revisioning enabled, Reset = address reset to the beginning address of the selected bank. If Design
Revisioning is not enabled, then Reset = address reset to address 0.
The BUSY input is only enabled when the XCFxxP is programmed for parallel data output and decompression is not enabled.
High
High
High
Low
X
High
Low
X
Control Inputs
(1)
R
Control Inputs
High
Low
Low
Low
Low
CE
High
Low
Low
CE
High
High
CF
↑
X
X
If address < TC
If address = TC
Held reset
Held reset
BUSY
High
Low
X
X
X
(1)
(5)
If address < TC
address < EA
If address < TC
address = EA
Else
If address = TC
Unchanged
Reset
Held reset
Held reset
Internal Address
(2)
(2)
: increment
: don't change
(4)
Internal Address
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Platform Flash In-System Programmable Configuration PROMS
(4)
(4)
(3)
(3)
(2)
(2)
(2)
: increment
: don't change
and
and
: don't change
external buffer should be used to drive the LED circuit to
ensure valid transitions on the PROM’s CE pin. If low-power
standby mode is not required for the PROM, then the CE pin
should be connected to ground.
Unchanged
Active and
High-Z
High-Z
High-Z
High-Z
Active
Active
DATA
High-Z
High-Z
High-Z
Active
DATA
CEO
High
High
High
High
High
High
Low
Outputs
Outputs
CEO
High
High
High
Low
CLKOUT
High-Z
High-Z
High-Z
High-Z
Active
Active
Active
Reduced
Standby
Active
Active
ICC
Reduced
Reduced
Standby
Active
Active
Active
Active
ICC
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