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2552K–AVR–04/11
ATmega329/3290/649/6490
13.3.1
Alternate Functions of Port A
The Port A has an alternate function as COM0:3 and SEG0:3 for the LCD Controller.
Table 13-3.
Port A Pins Alternate Functions
Port Pin
Alternate Function
PA7
SEG (LCD Front Plane 3)
PA6
SEG (LCD Front Plane 2)
PA5
SEG (LCD Front Plane 1)
PA4
SEG (LCD Front Plane 0)
PA3
COM (LCD Back Plane 3)
PA2
COM (LCD Back Plane 2)
PA1
COM (LCD Back Plane 1)
PA0
COM (LCD Back Plane 0)
Table 13-4.
Overriding Signals for Alternate Functions in PA7..PA4
Signal
Name
PA7/SEG3
PA6/SEG2
PA5/SEG1
PA4/SEG0
PUOE
LCDEN
PUOV
000
0
DDOE
LCDEN
DDOV
0
PVOE
000
0
PVOV
000
0
PTOE
–––
–
DIEOE
LCDEN
DIEOV
000
0
DI
–––
–
AIO
LCDSEG