DS025-4 (v1.5) July 23, 2001 www.xilinx.com Module 4 of 4
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Virtex-E Pin Defini tions
0Virte x™-E 1.8 V Extended Memory
Field Programmable Gat e Arra ys
DS025-4 (v1.5 ) Ju ly 23, 2001 00Preliminary Product Specification
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Pin Name Dedicated Pin Direction Description
GCK0, GCK1,
GCK2, GCK3 Yes Input Clock input pins that connect to Global Clock Buffers. These pins become
user inputs when not needed for clocks.
M0, M1, M2 Yes Input Mode pins are used to specify the configuration mode.
CCLK Yes Input or
Output Th e config urat ion Cloc k I/O pin: it is an input f or Se lectMAP a nd sla v e-serial
modes, and output in master-serial mode. After configuration, it is input only ,
logic level = Don’t Care.
PROGRAM Yes Input Initiates a configuration sequence when asserted Low.
DONE Yes Bidirectional Indicates that configuration loading is complete, and that the star t-up
sequen ce is in prog res s . The output can be open dr ain.
INIT No Bidirectional
(Open-drain) When Low , indicates that the configuration memory is being cleared. The pin
becomes a user I/O after configuration.
BUSY/DOUT No Output In SelectMAP mode, BUSY controls the rate at which configuration data is
loaded. The pin becomes a user I/O after configuration unless the
SelectMAP port is retained.
In bit-serial modes, DOUT provides preamble and configuration data to
downstream devices in a daisy-chain. The pin becomes a user I/O after
configuration.
D0/DIN,
D1, D2,
D3, D4,
D5, D6,
D7
No Input or
Output In SelectMAP mode, D0-7 are configuration data pins. These pins become
user I/Os after configuration unless the SelectMAP por t is retained.
In bit-s erial modes , DIN is the single dat a input. T his pin becom es a user I /O
after configurati on.
WRITE No Input In SelectMA P mode , the acti ve-l ow Write Ena ble s ignal. Th e pin becom es a
user I/O after configuration unless the SelectMAP port is retained.
CS No Input In SelectMAP mode, the active-low Chip Select signal. The pin becomes a
user I/O after configuration unless the SelectMAP port is retained.
TDI, TDO,
TMS, TCK Yes Mixed Boundary-scan Test-Access-Port pins, as defined in IEEE1149.1.
DXN, DXP Yes N/A Temperature-sensing diode pins. (Anode: DXP, cathode: DXN)
VCCINT Yes Input Power-supply pins for the internal core logic.
VCCO Yes Input Power-supply pins for the output drivers (subject to banking rules)
VREF No Input Input thre sh old voltage pins. Become user I/Os w he n an external threshold
vo ltage is not needed (subject to banking rules).
GND Yes Input Ground