December 11, 2006
Document No. 38-12026 Rev. *D
3
CY8C29x66 Automotive Data Sheet
PSoC® Overview
■
Modulators
■
Correlators
■
Peak Detectors
■
Many other topologies possible
Analog blocks are provided in columns of three, which includes
one CT (Continuous Time) and two SC (Switched Capacitor)
blocks, as shown in the figure below.
Analog System Block Diagram
Additional System Resources
System Resources, some of which have been previously listed,
provide additional capability useful to complete systems. Addi-
tional resources include a multiplier, decimator, switch mode
pump, low voltage detection, and power on reset. Brief state-
ments describing the merits of each system resource are pre-
sented below.
■
Digital clock dividers provide three customizable clock fre-
quencies 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.
■
Two multiply accumulates (MACs) provide fast 8-bit multiplier
with 32-bit accumulate to assist in both general math as well
as digital filters.
■
The decimator provides a custom hardware filter for digital
signal, processing applications including the creation of Delta
Sigma ADCs.
■
The I2C module provides 100 and 400 kHz communication
over two wires. Slave, master, and multi-master modes are
all supported.
■
Low Voltage Detection (LVD) interrupts can signal the appli-
cation of falling voltage levels, while the advanced POR
(Power On Reset) circuit eliminates the need for a system
supervisor.
■
An internal 1.3 voltage reference provides an absolute refer-
ence for the analog system, including ADCs and DACs.
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 data sheet is highlighted below.
ACB00
ACB01
Block Array
Array Input Configuration
ACI1[1:0]
ACI2[1:0]
ACB02
ACB03
ASC12
ASD13
ASD22
ASC23
ASD20
ACI0[1:0]
ACI3[1:0]
P0[6]
P0[4]
P0[2]
P0[0]
P2[2]
P2[0]
P2[6]
P2[4]
P0[7]
P0[5]
P0[3]
P0[1]
P2[3]
P2[1]
Reference
Generators
AGNDIn
RefIn
Bandgap
RefHi
RefLo
AGND
ASD11
ASC21
ASC10
Interface to
Digital System
M8C Interface (Address Bus, Data Bus, Etc.)
Analog Reference
PSoC Device Characteristics
PSoC Part
Number
CY8C29x66
up to
64
4
16
12
4
4
12
2K
32K
CY8C27x43
up to
44
2
8
12
4
4
12
256
Bytes
16K
CY8C24x94
56
1
4
48
2
2
6
1K
16K
CY8C24x23A
up to
24
14
12
2
2
6
256
Bytes
4K
CY8C21x34
up to
28
14
28
0
2
4a
a. Limited analog functionality.
512
Bytes
8K
CY8C21x23
16
1
4
8
0
2
4a
256
Bytes
4K
CY8C20x34
up to
28
0
0
28
0
0
3b
b. Two analog blocks and one CapSense.
512
Bytes
8K
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