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参数资料
型号： ATMEGA103-6AI
厂商： Atmel
文件页数： 141/141页
文件大小： 0K
描述： IC MCU 128K 6MHZ A/D IT 64TQFP
产品培训模块： megaAVR Introduction
标准包装： 90
系列： AVR® ATmega
核心处理器： AVR
芯体尺寸： 8-位
速度： 6MHz
连通性： SPI，UART/USART
外围设备： POR，PWM，WDT
输入/输出数： 32
程序存储器容量： 128KB（64K x 16）
程序存储器类型： 闪存
EEPROM 大小： 4K x 8
RAM 容量： 4K x 8
电压 - 电源 (Vcc/Vdd)： 4 V ~ 5.5 V
数据转换器： A/D 8x10b
振荡器型： 内部
工作温度： -40°C ~ 85°C
封装/外壳： 64-TQFP
包装： 托盘
配用： ATSTK501-ND - ADAPTER KIT FOR 64PIN AVR MCU
99
ATmega103(L)
0945I–AVR–02/07
Port E Data Register – PORTE
Port E Data Direction Register
– DDRE
Port E Input Pins Address –
PINE
The Port E Input Pins address (PINE) is not a register; this address enables access to
the physical value on each Port E pin. When reading PORTE, the Port E Data Latch is
read and when reading PINE, the logical values present on the pins are read.
Port E as General Digital I/O
PEn, general I/O pin: The DDEn bit in the DDRE Register selects the direction of this
pin. If DDEn is set (one), PEn is configured as an output pin. If DDEn is cleared (zero),
PEn is configured as an input pin. If PEn is set (one) when configured as an input pin,
the MOS pull-up resistor is activated. To switch the pull-up resistor off, the PEn 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 E
The alternate pin functions of Port E are:
PDI/RXD – Port E, Bit 0
PDI, Serial Programming Data Input. During Serial Program downloading, this pin is
used as data input line for the ATmega103(L).
RXD, UART Receive Pin. Receive Data (Data input pin for the UART). When the UART
Receiver is enabled, this pin is configured as an input regardless of the value of DDRD0.
When the UART forces this pin to be an input, a logical “1” in PORTD0 will turn on the
internal pull-up.
PDO/TXD – Port E, Bit 1
PDO, Serial Programming Data Output. During Serial Program downloading, this pin is
used as data output line for the ATmega103(L).
Bit
76543210
$03 ($23)
PORTE7
PORTE6
PORTE5
PORTE4
PORTE3
PORTE2
PORTE1
PORTE0
PORTE
Read/Write
R/W
Initial Value
00000000
Bit
76543210
$02 ($22)
DDE7
DDE6
DDE5
DDE4
DDE3
DDE2
DDE1
DDE0
DDRE
Read/Write
R/W
Initial Value
00000000
Bit
76543210
$01 ($21)
PINE7
PINE6
PINE5
PINE4
PINE3
PINE2
PINE1
PINE0
PINE
Read/Write
RRRRRRRR
Initial Value
N/A
Table 34. DDEn Bits on Port E Pins
DDEn
PORTEn
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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