CY8C52 CYPRESS [Cypress Semiconductor], CY8C52 Datasheet - Page 49

• Manufacturer Part Number: CY8C52
• Description: Programmable System-on-Chip (PSoC)
• Manufacturer: CYPRESS [Cypress Semiconductor]

8.3.2 LUT
The CY8C52 family of devices contains two LUTs. The LUT is a
two input, one output lookup table that is driven by 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: 001-55034 Rev. *A
Control Word
0000b
0001b
0010b
0100b
0101b
1000b
0011b
0110b
0111b
Routing
Analog
From
Table 8-1
Output (A and B are LUT inputs)
.
A AND (NOT B )
(NOT A ) AND B
FALSE (‘0’)
A NOR B
A AND B
A XOR B
A OR B
+
_
A
B
comp0
PRELIMINARY
Figure 8-4. Analog Comparator
4
LUT0
4
4
LUT1
4
UDBs
ANAIF
Table 8-1. LUT Function vs. Program Word and Inputs (con-
8.4 LCD Direct Drive
The PSoC Liquid Crystal Display (LCD) driver system is a highly
configurable peripheral designed to allow PSoC to directly drive
a broad range of LCD glass. All voltages are generated on chip,
eliminating the need for external components. With a high
multiplex ratio of up to 1/16, the CY8C52 family LCD driver
system can drive a maximum of 736 segments. The PSoC LCD
driver module was also designed with the conservative power
budget of portable devices in mind, enabling different LCD drive
modes and power down modes to conserve power.
PSoC Creator provides an LCD segment drive component. The
component wizard provides easy and flexible configuration of
LCD resources. You can specify pins for segments and
4
LUT2
4
PSoC
Control Word
4
LUT3
4
1001b
1010b
1011b
1100b
1101b
1110b
1111b
®
comp1
5: CY8C52 Family Data Sheet
_
+
Output (A and B are LUT inputs)
Routing
Analog
A OR (NOT B )
(NOT A ) OR B
From
A XNOR B
A NAND B
TRUE (‘1’)
NOT B
NOT A
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