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參數(shù)資料
| 型號： | AT43USB351M-AC |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Full-speed/Low-speed USB Microcontroller with ADC and PWM |
| 中文描述： | 8-BIT, MROM, 24 MHz, RISC MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, 0.50 MM PITCH, PLASTIC, MS-026BBC, LQFP-48 |
| 文件頁數(shù)： | 67/101頁 |
| 文件大?。?/td> | 624K |
| 代理商： | AT43USB351M-AC |
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67
AT43USB351M
3302E–USB–7/04
Port B
Port B is a 4-bit bi-directional I/O port. The Port B output buffers can sink or source 2 mA.
Three I/O memory address locations are allocated for the Port B, one each for the Data Regis-
ter - PORTB, $18($38), Data Direction Register (DDRB), $17($37) and the Port B Input Pins
(PINB), $16($36). The Port B Input Pins address is read only, while the Data Register and the
Data Direction Register are read/write.
All port pins have individually selectable pull-up resistors. When pins PB0 to PB7 are used as
inputs and are externally pulled low, they will source current if the internal pull-up resistors are
activated
The Port B pins with alternate functions are shown in the following table:
When the pins are used for the alternate function the DDRB and PORTB register has to be set
according to the alternate function description.
Table 26.
Port B Pins Alternate Functions
Port Pin
Alternate Functions
PB4
SS (SPI Slave Select Input)
PB5
MOSI (SPI Bus Master Output/Slave Input)
PB6
MISO (SPI Bus Master Input/Slave Output)
PB7
SCK (SPI Bus Serial Clock)
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相關(guān)代理商/技術(shù)參數(shù) |
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| AT43USB353M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
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| AT43USB353M_04 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low Cost Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| AT43USB353M-AC | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low Cost Full-speed USB Microcontroller with Embedded Hub, ADC and PWM |
| AT43USB355 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
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