CY8C3865LTI-059 datasheet(10/129 Pages) CYPRESS

10 / 129 page

PSoC® 3: CY8C38 Family

Data Sheet

Document Number: 001-11729 Rev. *R

Page 10 of 129

Figure 2-6. Example PCB Layout for 100-pin TQFP Part for Optimal Analog Performance

3. Pin Descriptions

IDAC0, IDAC1, IDAC2, IDAC3

Low resistance output pin for high current DACs (IDAC).

OpAmp0out, OpAmp1out, OpAmp2out, OpAmp3out

High current output of uncommitted opamp[12].

Extref0, Extref1

External reference input to the analog system.

OpAmp0–, OpAmp1–, OpAmp2–, OpAmp3–

Inverting input to uncommitted opamp.

OpAmp0+, OpAmp1+, OpAmp2+, OpAmp3+

Noninverting input to uncommitted opamp.

GPIO

General purpose I/O pin provides interfaces to the CPU, digital

peripherals, analog peripherals, interrupts, LCD segment drive,

and CapSense[12].

I2C0: SCL, I2C1: SCL

I2C SCL line providing wake from sleep on an address match.

Any I/O pin can be used for I2C SCL if wake from sleep is not

required.

I2C0: SDA, I2C1: SDA

I2C SDA line providing wake from sleep on an address match.

Any I/O pin can be used for I2C SDA if wake from sleep is not

required.

Ind

Inductor connection to boost pump.

kHz XTAL: Xo, kHz XTAL: Xi

32.768-kHz crystal oscillator pin.

MHz XTAL: Xo, MHz XTAL: Xi

4- to 25-MHz crystal oscillator pin.

nTRST

Optional JTAG test reset programming and debug port

connection to reset the JTAG connection.

SIO

Special I/O provides interfaces to the CPU, digital peripherals

and interrupts with a programmable high threshold voltage,

analog comparator, high sink current, and high impedance state

when the device is unpowered.

SWDCK

Serial wire debug clock programming and debug port

connection.

SWDIO

Serial wire debug input and output programming and debug port

connection.

SWV.

Single wire viewer debug output.

TCK

JTAG test clock programming and debug port connection.

TDI

JTAG test data in programming and debug port connection.

TDO

JTAG test data out programming and debug port connection.

Vddd

Vssd

Vdda

Vssa

Vssd

Plane

Vssa

Plane

Note

12. GPIOs with opamp outputs are not recommended for use with CapSense.

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CY8C3865LTI-059 Datasheet(PDF) 10 Page - Cypress Semiconductor

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