XC3S100E Xilinx Corp., XC3S100E Datasheet - Page 78

• Manufacturer Part Number: XC3S100E
• Description: Spartan-3e Fpga Family Complete Data Sheet
• Manufacturer: Xilinx Corp.

Functional Description
78
PROG_B
Recommend
open-drain
TMS
TDO
TCK
driver
TDI
+2.5V
JTAG
Variant Select
SPI Mode
‘0’
‘0’
‘1’
‘1’
‘1’
‘0’
P
Figure 54: Atmel SPI-based DataFlash Configuration Interface
HSWAP
M2
M1
M0
VS2
VS1
VS0
TDI
TMS
TCK
PROG_B
Spartan-3E
VCCINT
FPGA
+1.2V
GND
VCCO_0
VCCAUX
VCCO_2
CSO_B
DONE
INIT_B
DOUT
MOSI
CCLK
TDO
DIN
VCCO_0
+3.3V
+2.5V
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I
W
‘1’
+3.3V
P
SI
SO
CS
WP
RESET
RDY/BUSY
SCK
+2.5V
+3.3V
GND
VCC
DataFlash
AT45DB
PROG_B
Atmel
INIT_B
Power-on monitor is only required if
+3.3V (VCCO_2) supply is the last supply
in power-on sequence, after VCCINT
and VCCAUX. Must delay FPGA
configuration for > 20 ms after SPI
DataFlash reaches its minimum VCC.
Force FPGA INIT_B input OR PROG_B
input Low with an open-drain or open-
collector driver.
DS312-2 (v3.6) May 29, 2007
Power-On
Power-On
Monitor
Monitor
+3.3V
+3.3V
or
Product Specification
DS312-2_50a_031706
R