AT45DB021D-SS 查看數據表（PDF） - Atmel Corporation

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AT45DB021D-SS

8-bit Atmel Microcontrollers

Atmel Corporation 

Table 4-4. Expansion header J3.

Pin on J3

Name on J3 XMEGA pin

1

PA0

PA0

2

PA1

PA1

3

PA2

PA2

Shared with onboard functionality

Light sensor (1)

Temperature sensor (1)

Filter output (1)

4

PA3

PA3

Display reset

5

PB4

PB4

JTAG TMS

6

PB5

PB5

JTAG TDI

7

PB6

PB6

JTAG TCK

8

PB7

PB7

JTAG TDO

9

GND

-

-

10

VCC_P5V0

-

-

Note: 1. Can be disconnected from onboard functionality by cut-straps.

The header J4 offers digital communication interfaces such as UART and TWI but

care must be taken because some pins are also connected to on-board peripherals.

Table 4-5. Expansion header J4.

Pin on J4

Name on J4 XMEGA pin

Shared with onboard functionality

1

SDA

PE0

-

2

SCL

PE1

-

3

RXD

PE2

-

4

TXD

PE3

-

5

SS

PD0

Display register select (1)

6

MOSI

PD3

Serial flash MOSI

7

MISO

PD2

Display and serial flash MISO input

8

SCK

PD1

Display and serial flash clock input

9

GND

-

-

10

VCC_P3V3

-

-

Note: 1. Can be disconnected from onboard functionality by cut-strap (J204).

8 Atmel AVR1923

8394B-AVR-02/12

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