3.3 Analog System
The Analog System is composed of 12 configurable blocks, each
comprised of an opamp circuit allowing the creation of complex
analog signal flows. Analog peripherals are very flexible and can
be customized to support specific application requirements.
Some of the more common PSoC analog functions (most
available as user modules) are listed below.
Figure 3-2. Analog System Block Diagram
Analog-to-digital converters (up to 4, with 6- to 14-bit resolution,
selectable as Incremental, Delta Sigma, and SAR)
Filters (2, 4, 6, and 8 pole band-pass, low-pass, and notch)
Amplifiers (up to 4, with selectable gain to 48x)
Instrumentation amplifiers (up to 2, with selectable gain to 93x)
Comparators (up to 4, with 16 selectable thresholds)
DACs (up to 4, with 6- to 9-bit resolution)
Multiplying DACs (up to 4, with 6- to 9-bit resolution)
High current output drivers (four with 30 mA drive as a Core
1.3V reference (as a System Resource)
Many other topologies possible
Array Input Configuration
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.
M8C Interface (Address Bus, Data Bus, Etc.)
3.4 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. Statements
describing the merits of each system resource are below.
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
The I2C module provides 100 and 400 kHz communication over
two wires. Slave, master, and multi-master modes are all
Document Number: 38-12013 Rev. *K
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