ATmega169PA
2.2.14 AREF
2.2.15 LCDCAP
This is the analog reference pin for the A/D Converter.
An external capacitor (typical > 470 nF) must be connected to the LCDCAP pin as shown in Fig-
ure 23-2 on page 234. This capacitor acts as a reservoir for LCD power (VLCD). A large
capacitance reduces ripple on VLCD but increases the time until VLCD reaches its target value.
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8171B–AVR–03/10