ATMEGA1284P-XPLD【PDF 8/15 页】MEGA-1284P XPLAINED EVAL KIT

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Table 4-4. Atmel MEGA-1284P Xplained I/O expansion header – J3.

Pin

1

2

3

4

5

J3

GPIO0

GPIO1

GPIO2

GPIO3

GPIO4

ATmega1284P pin

PB0

PB1

PB2

PB3

PD4

Shared with onboard functionality

SW0, LED0

SW1, LED2

SW2, LED3

LED1

J4 (SPI SS1), DataFlash (SPI SS1)

6

7

8

9

GPIO5

GPIO6

GPIO7

GND

(1)

PD5

PC4

PC5

-

Filter input

JTAG(TDO)

JTAG(TDI)

-

10

VCC_P5V0

(2)

-

-

Notes:

1. This signal can be disconnected from the filter input by cutting the cut-strap

marked FILTER INPUT in the SENSORS & FILTER section on the bottom side

of the board.

2. Pin 10 of header J3 is connected to the USB voltage (VCC_P5V0).

Table 4-5. MEGA-1284P Xplained I/O expansion header – J4.

Pin

1

2

3

4

5

J4

TWI SDA

TWI SCL

USART RXD1

USART TXD1

SPI SS1

ATmega1284P pin

PC1

PC0

PD2

PD3

PD4

Shared with onboard functionality

Header J1, board controller

Header J1, board controller

Board controller

Board controller

Header J3 (GPIO4), DataFlash

6

7

SPI MOSI

SPI MISO

(1)

(1)

PB5

PB6

Header J1, DataFlash, board controller

Header J1, DataFlash, board controller

8

9

10

SPI SCK (1)

GND

VCC_P3V3

PB7

-

-

Header J1, DataFlash, board controller

-

-

Note:

1. These signals can be disconnected from the board controller by cutting the cut-

straps marked SPI on the bottom side of the board.

8

AVR364

8377B-AVR-11/11

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