CY8C54 CYPRESS [Cypress Semiconductor], CY8C54 Datasheet - Page 49

• Manufacturer Part Number: CY8C54
• Description: Programmable System-on-Chip (PSoC)
• Manufacturer: CYPRESS [Cypress Semiconductor]

8.3.2 LUT
The CY8C54 family of devices contains four LUTs. The LUT is a
two input, one output lookup table that is driven by any one or
two of the comparators in the chip. The output of any LUT is
routed to the digital system interface of the UDB array. From the
digital system interface of the UDB array, these signals can be
connected to UDBs, DMA controller, I/O, or the interrupt
controller.
The LUT control word written to a register sets the logic function
on the output. The available LUT functions and the associated
control word is shown in
Table 8-1. LUT Function vs. Program Word and Inputs
Document Number: 001-55036 Rev. *A
Control Word
0000b
0001b
0010b
0011b
Routing
Routing
Analog
Analog
From
From
Table 8-1
Output (A and B are LUT inputs)
.
A AND (NOT B )
FALSE (‘0’)
A AND B
comp2
+
_
+
_
comp0
A
PRELIMINARY
Figure 8-4. Analog Comparator
4
LUT0
4
4
LUT1
4
ANAIF
UDBs
Table 8-1. LUT Function vs. Program Word and Inputs (con-
4
LUT2
4
PSoC
4
Control Word
LUT3
4
0100b
0101b
1000b
1001b
1010b
0110b
0111b
1011b
1100b
1101b
1110b
1111b
®
comp1
comp3
5: CY8C54 Family Data Sheet
_
_
+
+
Output (A and B are LUT inputs)
Routing
Analog
Routing
(NOT A ) AND B
From
Analog
A OR (NOT B )
(NOT A ) OR B
From
A XNOR B
A NAND B
TRUE (‘1’)
A NOR B
A XOR B
A OR B
NOT B
NOT A
B
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