Specifications

CY8C24123A
CY8C24223A
CY8C24423A
Document Number: 38-12028 Rev. *V Page 6 of 71
Additional System Resources
System resources, some of which are listed in the previous
sections, provide additional capability useful to complete
systems. Additional resources include a multiplier, decimator,
switch-mode pump, low-voltage detection, and power-on-reset
(POR). Statements describing the merits of each system
resource follow:
■ 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 may
be generated using digital PSoC blocks as clock dividers.
■ A multiply accumulate (MAC) provides a fast 8-bit multiplier
with 32-bit accumulate, to assist in both 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 are supported.
■ Low-voltage detection (LVD) interrupts can signal the appli-
cation 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 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. Table 1 on page 6 lists the resources available for specific PSoC device groups. The PSoC device covered by this
datasheet is highlighted in this table.
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
[2]
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
[2]
1 K 16 K
CY8C21x45 up to 24 1 4 up to 24 0 4 6
[2]
512 8 K
CY8C21x34 up to 28 1 4 up to 28 0 2 4
[2]
512 8 K
CY8C21x23 up to 16 1 4 up to 8 0 2 4
[2]
256 4 K
CY8C20x34 up to 28 0 0 up to 28 0 0 3
[2,3]
512 8 K
CY8C20xx6 up to 36 0 0 up to 36 0 0 3
[2,3]
up to
2 K
up to
32 K
Notes
2. Limited analog functionality.
3. Two analog blocks and one CapSense
®
.