Product Specifications

CY8C29466/CY8C29566
CY8C29666/CY8C29866
Document Number: 38-12013 Rev. AB Page 6 of 67
Additional System Resources
System resources, some of which were 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 (POR).
■ 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 a 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.
■ 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 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.
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.
Table 1. PSoC Device Characteristics
PSoC Part
Number
Digital
I/O
Digital
Rows
Digital
Blocks
Analog
Inputs
Analog
Outputs
Analog
Columns
Analog
Blocks
SRAM
Size
Flash
Size
CY8C29x66 up to 64 4 16 up to 12 4 4 12 2 K 32 K
CY8C28xxx up to 44 up to 3 up to 12 up to 44 up to 4 up to 6 up to
12 + 4
[3]
1 K 16 K
CY8C27x43 up to 44 2 8 up to 12 4 4 12 256 16 K
CY8C24x94 up to 56 1 4 up to 48 2 2 6 1 K 16 K
CY8C24x23A up to 24 1 4 up to 12 2 2 6 256 4 K
CY8C23x33 up to 26 1 4 up to 12 2 2 4 256 8 K
CY8C22x45 up to 38 2 8 up to 38 0 4 6
[3]
1 K 16 K
CY8C21x45 up to 24 1 4 up to 24 0 4 6
[3]
512 8 K
CY8C21x34 up to 28 1 4 up to 28 0 2 4
[3]
512 8 K
CY8C21x23 up to 16 1 4 up to 8 0 2 4
[3]
256 4 K
CY8C20x34 up to 28 0 0 up to 28 0 0 3
[3,4]
512 8 K
CY8C20xx6 up to 36 0 0 up to 36 0 0 3
[3,4]
up to 2 K up to 32 K
Notes
3. Limited analog functionality.
4. Two analog blocks and one CapSense
®
.