User's Manual

Atmel AVR2092
5
8427A-AVR-10/11
4.1.1 Atmel ATmega1281 configuration
Table 4-1. Default expansion connector mapping (ATmega1281 configuration).
Pin# Function Pin# Function
1 GND 2 GND
3 n.c. 4 n.c.
5 n.c. 6 n.c.
7 n.c. 8 n.c.
9 n.c. 10 n.c.
11 n.c. 12 n.c.
13 n.c. 14 n.c.
15 n.c. 16 n.c.
17 XT1 (MCLK) 18 n.c.
19 Vcc 20 Vcc
21 GND 22 GND
23 PB7 (open) 24 PB6 (open)
25 PB5 (RSTN) 26 PB4 (SLPTR)
27 PB3 (MISO) 28 PB2 (MOSI)
29 PB1 (SCLK) 30 PB0 (SEL)
31 PD7 (TP1) 32 PD6 (MCLK)
33 PD5 (TP2) 34 PD4 (DIG2)
35 PD3 (TP3) 36 PD2 (open)
37 PD1 (TP4) 38 PD0 (IRQ)
39 GND 40 EE#WP (write protect EEPROM)
4.1.2 Atmel ATmega644 configuration
Table 4-2. Expansion connector mapping when assembled for ATmega644.
Pin# Function Pin# Function
1 GND 2 GND
3 n.c. 4 n.c.
5 n.c. 6 n.c.
7 n.c. 8 n.c.
9 n.c. 10 n.c.
11 n.c. 12 n.c.
13 n.c. 14 n.c.
15 n.c. 16 n.c.
17 XT1 (MCLK) 18 n.c.
19 Vcc 20 Vcc
21 GND 22 GND
23 PB7 (SCLK) 24 PB6 (MISO)
25 PB5 (MOSI) 26 PB4 (SEL)
27 PB3 (open) 28 PB2 (RSTN)