© 2002 QuickLogic Corporati on
www.quicklogic.com
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QL6325 Eclipse Data Sheet Rev C
Table 17: Dedicat ed Pin Descriptions
Pin Function Description
CLK
High-drive input and/or global
clock network driver
Can be configured as either input or global clock
I/O(A) Input/Output pin
The I/O pin is a bi-directional pin, configurable to either an inputonly, output-only, or bi-directional pin. The A inside the
parenthesis means that the I/O is located in Bank A. If an I/O is
not used, SpDE (QuickWorks Tool) provides the option of tying
that pin to GND, V
CC,
or TriState during programming.
V
CC
Power supply pin Connect to 2.5 V supply
V
CCIO
(A) Input voltage tolerance pin
This pin provides the flexibility to interface the device with either a
3.3 V device or a 2.5 V device. The A inside the parenthesis
means that V
CCIO
is located in BANK A. Every I/O pin in Bank A
will be tolerant of V
CCIO
input signals and will output V
CCIO
level
signals. This pin must be connected to either 3.3 V or V
CC
.
GND Ground pin Connect to ground
PLLIN PLL clock input Clock input for PLL
DEDCLK Dedicated clock pin Low skew global clock
GNDPLL Ground pin for PLL Connect to GND
INREF(A) Differential reference voltage
The INREF is the reference voltage pin for GTL+, SSTL2, and
STTL3 standards. Follow the recommendations provided in
Table 14 for the appropriate standard. The A inside the
parenthesis means that INREF is located in BANK A. This pin
should be tied to GND if not needed.
PLLOUT PLL output pin Dedicated PLL output pin; otherwise, may be left unconnected
IOCTRL(A) Highdrive input
This pin provides fast RESET, SET, CLOCK, and ENABLE access
to the I/O cell flip-flops, providing fast clock-to-out and fast I/O
response times. This pin can also double as a high-drive pin to the
internal logic cells. The A inside the parenthesis means that
IOCTRL is located in Bank A. This pin should be tied to GND or
V
CC
if it is not used.