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ProASIC3 DC and Switching Characteristics
2-68
Revision 13
I/O Register Specifications
Fully Registered I/O Buffers with Synchronous Enable and
Asynchronous Preset
Figure 2-14 Timing Model of Registered I/O Buffers with Synchronous Enable and Asynchronous Preset
INBUF
TRIBUF
CLKBUF
INBUF
CLKBUF
Data Input I/O Register with:
Active High Enable
Active High Preset
Positive-Edge Triggered
Data Output Register and
Enable Output Register with:
Active High Enable
Active High Preset
Postive-Edge Triggered
Pad
Out
CLK
Enable
Preset
Data_out
Data
EOUT
DOUT
Enable
CLK
DQ
DFN1E1P1
PRE
DQ
DFN1E1P1
PRE
DQ
DFN1E1P1
PRE
D_Enable
A
B
C
D
E
F
G
H
I
J
L
K
Y
Core
Array