
13
Supply Voltage Considerations (2 of 2)
V
IO
considerations
V
IO
≤ V
DD
Not all packages have a V
IO
pin
Reset can be pulled up to VDD
V
PP
considerations
When using in-application programming (IAP) a 4.7 uF capacitor is required on
the V
PP
pin
It is not recommended to use the V
PP
pin as GPIO if IAP to be used
• If GPIO and IAP are required then the external circuit on the pin must not provide a
load when the programming is enabled
V
PP
V
IO
V
DD
4.7 µF
V
REGIN
V
BUS
1.0 µF 0.1 µF
1.0 µF 0.1 µF
Typical Connections
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