XCS05-3BG256C XILINX [Xilinx, Inc], XCS05-3BG256C Datasheet - Page 30

• Manufacturer Part Number: XCS05-3BG256C
• Description: Spartan and Spartan-XL FPGA
• Manufacturer: XILINX [Xilinx, Inc]

Spartan and Spartan-XL FPGA Families Data Sheet
to the DONE pin. User I/Os for each device become active
after the DONE pin for that device goes High. (The exact
timing is determined by development system options.)
Since the DONE pin is open-drain and does not drive a High
value, tying the DONE pins of all devices together prevents
all devices in the chain from going High until the last device
30
DATA BUS
PROGRAM
CCLK
INIT
8
3.3K
VCC
V CC
CS1
D0-D7
PROGRAM
INIT
CCLK
M0
Spartan-XL
Figure 27: Express Mode Circuit Diagram
DOUT
DONE
M1
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8
in the chain has completed its configuration cycle. If the
DONE pin of a device is left unconnected, the device
becomes active as soon as that device has been config-
ured. Only devices supporting Express mode can be used
to form an Express mode daisy chain.
8
PROGRAM
CS1
D0-D7
INIT
Daisy-Chained
CCLK
M0
Spartan-XL
Optional
DONE
DOUT
M1
DS060 (v1.8) June 26, 2008
Product Specification
To Additional
Optional
Daisy-Chained
Devices
To Additional
Optional
Daisy-Chained
Devices
DS060_27_080400
R