CY8C27143, CY8C27243
CY8C27443, CY8C27543
CY8C27643
Additional System Resources
System resources, some of which have been previously listed,
provide additional capability useful to complete systems.
Additional resources include a multiplier, decimator, switch mode
pump, low voltage detection, and power on reset.
■
■
The I
2
C module provides 100 and 400 kHz communication over
two wires. Slave, master, and multi-master modes are all
supported.
LVD interrupts can signal the application of falling voltage
levels, while the advanced power-on reset (POR) circuit
eliminates the need for a system supervisor.
An internal 1.3-V reference provides an absolute reference for
the analog system, including ADCs and DACs.
An integrated switch mode pump (SMP) generates normal
operating voltages from a single 1.2-V battery cell, providing a
low cost boost converter.
Digital clock dividers provide three customizable clock
frequencies for use in applications. The clocks can be routed
to both the digital and analog systems. Additional clocks can
be generated using digital PSoC blocks as clock dividers.
Multiply accumulate (MAC) provides fast 8-bit multiplier with
32-bit accumulate, to assist in general math and digital filters.
The decimator provides a custom hardware filter for digital
signal processing applications including the creation of Delta
Sigma ADCs.
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PSoC Device Characteristics
Depending on your PSoC device characteristics, the digital and analog systems can have 16, 8, or 4 digital blocks and 12, 6, or 4
analog blocks. The following table lists the resources available for specific PSoC device groups.The PSoC device covered by this
datasheet is highlighted in
Table 1. PSoC Device Characteristics
PSoC Part
Number
CY8C29x66
CY8C28xxx
CY8C27x43
CY8C24x94
CY8C24x23A
CY8C23x33
CY8C22x45
CY8C21x45
CY8C21x34
CY8C21x23
CY8C20x34
CY8C20xx6
Digital
I/O
up to 64
up to 44
up to 44
up to 56
up to 24
up to 26
up to 38
up to 24
up to 28
up to 16
up to 28
up to 36
Digital
Rows
4
up to 3
2
1
1
1
2
1
1
1
0
0
Digital
Blocks
16
up to 12
8
4
4
4
8
4
4
4
0
0
Analog
Inputs
up to 12
up to 44
up to 12
up to 48
up to 12
up to 12
up to 38
up to 24
up to 28
up to 8
up to 28
up to 36
Analog
Outputs
4
up to 4
4
2
2
2
0
0
0
0
0
0
Analog
Columns
4
up to 6
4
2
2
2
4
4
2
2
0
0
Analog
Blocks
12
up to
12 + 4
12
6
6
4
6
6
4
SRAM
Size
2K
1K
256
1K
256
256
1K
512
512
256
512
up to 2 K
Flash
Size
32 K
16 K
16 K
16 K
4K
8K
16 K
8K
8K
4K
8K
up to 32 K
4
3
3
Notes
1. Limited analog functionality.
2. Two analog blocks and one CapSense
®
.
Document Number: 38-12012 Rev. *T
Page 5 of 63
CYPRESS [ CYPRESS SEMICONDUCTOR ]
