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参数资料
型号： ATMEGA103-6AI
厂商： Atmel
文件页数： 129/141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
88
ATmega103(L)
0945I–AVR–02/07
inputs and are externally pulled low, they will source current if the internal pull-up resis-
tors are activated.
The Port B pins with alternate functions are shown in Table 29.
When the pins are used for the alternate function, the DDRB and PORTB Registers
have to be set according to the alternate function description.
Port B Data Register – PORTB
Port B Data Direction Register
– DDRB
Port B Input Pins Address –
PINB
The Port B Input Pins address (PINB) is not a register; this address enables access to
the physical value on each Port B pin. When reading PORTB, the Port B Data Latch is
read and when reading PINB, the logical values present on the pins are read.
Port B as General Digital I/O
All eight pins in Port B have equal functionality when used as digital I/O pins.
PBn, general I/O pin: The DDBn bit in the DDRB Register selects the direction of this
pin. If DDBn is set (one), PBn is configured as an output pin. If DDBn is cleared (zero),
PBn is configured as an input pin. If PORTBn is set (one) when the pin configured as an
input pin, the MOS pull-up resistor is activated. To switch the pull-up resistor off, the
PORTBn 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.
Table 29. Port B Pin Alternate Functions
Port Pin
Alternate Functions
PB0
SS (SPI Slave Select input)
PB1
SCK (SPI Bus Serial Clock)
PB2
MOSI (SPI Bus Master Output/Slave Input)
PB3
MISO (SPI Bus Master Input/Slave Output)
PB4
OC0/PWM0 (Output Compare and PWM Output for Timer/Counter0)
PB5
OC1A/PWM1A (Output Compare and PWM Output A for Timer/Counter1)
PB6
OC1B/PWM1B (Output Compare and PWM Output B for Timer/Counter1)
PB7
OC2/PWM2 (Output Compare and PWM Output for Timer/Counter2)
Bit
76543210
$18 ($38)
PORTB7
PORTB6
PORTB5
PORTB4
PORTB3
PORTB2
PORTB1
PORTB0
PORTB
Read/Write
R/W
Initial Value
00000000
Bit
76543210
$17 ($37)
DDB7
DDB6
DDB5
DDB4
DDB3
DDB2
DDB1
DDB0
DDRB
Read/Write
R/W
Initial Value
00000000
Bit
76543210
$16 ($36)
PINB7
PINB6
PINB5
PINB4
PINB3
PINB2
PINB1
PINB0
PINB
Read/Write
RRRRRRRR
Initial Value
N/A
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