CY8C20111_12 CYPRESS [Cypress Semiconductor], CY8C20111_12 Datasheet - Page 7

• Manufacturer Part Number: CY8C20111_12
• Manufacturer: CYPRESS [Cypress Semiconductor]

Typical Circuits
Document Number: 001-53516 Rev. *H
Note
4. For low power requirements, if VDD is to be turned off, the above concept can be used. The VDDs of CapSense Express, I2C pull-ups, and LEDs must be from the
same source. Turning off the VDD ensures that no signal is applied to the device while it is unpowered. The I2C signals should not be driven high by the master in
this situation. If a port pin or group of port pins can cater to the power supply requirement of the circuit, the LDO can be avoided.
Figure 7. Circuit-5: Powering Down CapSense Express Device for Low Power Requirements
(continued)
Master
Host
Or
Output
enable
LDO
CapSense Express
Output
VDD
SDA
SCL
LED
I2C Pull
CY8C20111, CY8C20121
UPs
BUS
I2C
[4]
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