參數(shù)資料
型號： ATMEGA103-6AI
廠商： Atmel
文件頁數(shù)： 137/141頁
文件大?。?/td> 0K
描述： IC MCU 128K 6MHZ A/D IT 64TQFP
產(chǎn)品培訓模塊： megaAVR Introduction
標準包裝： 90
系列： AVR® ATmega
核心處理器： AVR
芯體尺寸： 8-位
速度： 6MHz
連通性： SPI，UART/USART
外圍設備： POR，PWM，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 128KB（64K x 16）
程序存儲器類型： 閃存
EEPROM 大小： 4K x 8
RAM 容量： 4K x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 64-TQFP
包裝： 托盤
配用： ATSTK501-ND - ADAPTER KIT FOR 64PIN AVR MCU
95
ATmega103(L)
0945I–AVR–02/07
When the pins are used for the alternate function, the DDRD and PORTD Registers
have to be set according to the alternate function description.
Port D Data Register – PORTD
Port D Data Direction Register
– DDRD
Port D Input Pins Address –
PIND
The Port D Input Pins address (PIND) is not a register, and this address enables access
to the physical value on each Port D pin. When reading PORTD, the Port D Data Latch
is read, and when reading PIND, the logical values present on the pins are read.
Port D as General Digital I/O
PDn, General I/O pin: The DDDn bit in the DDRD Register selects the direction of this
pin. If DDDn is set (one), PDn is configured as an output pin. If DDDn is cleared (zero),
PDn is configured as an input pin. If PDn is set (one) when configured as an input pin
the MOS pull-up resistor is activated. To switch the pull-up resistor off the PDn has to be
cleared (zero) or the pin has to be configured as an output pin. The port pins are tri-
stated when a reset condition becomes active, even if the clock is not running.
Note:
n: 7,6...0, pin number
Alternate Functions of Port D
The alternate pin functions of Port D are:
INT0..INT3 – Port D, Bits 0..3
External Interrupt sources 0 - 3. The PD0 - PD3 pins can serve as external active low
interrupt sources to the MCU. The internal pull-up MOS resistors can be activated as
described above. See the interrupt description for further details, and how to enable the
sources.
Bit
76543210
$12
PORTD7
PORTD6
PORTD5
PORTD4
PORTD3
PORTD2
PORTD1
PORTD0
PORTD
Read/Write
R/W
Initial Value
00000000
Bit
76543210
$11
DDD7
DDD6
DDD5
DDD4
DDD3
DDD2
DDD1
DDD0
DDRD
Read/Write
R/W
Initial Value
00000000
Bit
76543210
$10
PIND7
PIND6
PIND5
PIND4
PIND3
PIND2
PIND1
PIND0
PIND
Read/Write
RRRRRRRR
Initial Value
N/A
Table 32. DDDn Bits on Port D Pins
DDDn
PORTDn
I/O
Pull-up
Comment
0
Input
No
Tri-state (high-Z)
0
1
Input
Yes
PDn will source current if ext. pulled low.
1
0
Output
No
Push-pull Zero Output
1
Output
No
Push-pull One Output
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