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The I/O pins are +3.3v cells, which are +5V tolerant.
Document Reference No.: FT_000198
MORPH-IC-II Datasheet
Version 1.04
Clearance No.: FTDI# 164
Parameter
Vil
Vih
Vt
Vt-
Vt+
Rpu
Rpd
R CONT
Description
Input low Switching
Threshold
Input High Switching
Threshold
Switching Threshold
Schmitt trigger negative
going threshold voltage
Schmitt trigger positive
going threshold voltage
Input pull-up resistance
Input pull-down
resistance
Value of I/O pin pull-up
resistor of FPGA before
and during configuration
Minimum
2.00
0.80
40
40
10
Typical
-
-
1.50
1.10
1.60
75
75
25
Maximum
0.80
-
2.00
190
190
50
Units
V
V
V
V
V
K?
K?
K?
Conditions
LVTTL
LVTTL
LVTTL
Vin = 0
Vin =VCCIO
V CCIO = 3.3V
Table 5.4 – I/O Pin Characteristics VCCIO = +3.3V
Detailed electrical characteristics of the FT2232H can be found in its datasheet at
http://www.ftdichip.com/Documents/DataSheets.htm#ICs .
Detailed electrical characteristics and ratings of the FPGA can be found in the Cyclone II handbook. This
handbook can be found at http://www.altera.com/products/devices/cyclone2/cy2-index.jsp .
Copyright ? 2010 Future Technology Devices International Limited
21
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