ATmega169P
12.3.1
Alternate Functions of Port A
The Port A has an alternate function as COM0:3 and SEG0:3 for the LCD Controller.
Table 12-3. Port A Pins Alternate Functions
Port Pin
PA7
Alternate Function
SEG3 (LCD Front Plane 3)
SEG2 (LCD Front Plane 2)
SEG1 (LCD Front Plane 1)
SEG0 (LCD Front Plane 0)
COM3 (LCD Back Plane 3)
COM2 (LCD Back Plane 2)
COM1 (LCD Back Plane 1)
COM0 (LCD Back Plane 0)
PA6
PA5
PA4
PA3
PA2
PA1
PA0
Table 12-4 and Table 12-5 relates the alternate functions of Port A to the overriding signals
shown in Figure 12-5 on page 71.
Table 12-4. Overriding Signals for Alternate Functions in PA7..PA4
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
PA7/SEG3
PA6/SEG2
PA5/SEG1
PA4/SEG0
LCDEN
LCDEN
LCDEN
LCDEN
0
0
0
0
LCDEN
LCDEN
LCDEN
LCDEN
0
0
0
0
0
0
0
0
0
0
0
0
–
–
–
–
LCDEN
LCDEN
LCDEN
LCDEN
0
0
0
0
–
–
–
–
AIO
SEG3
SEG2
SEG1
SEG0
73
8018A–AVR–03/06
ATMEL [ ATMEL ]
