參數(shù)資料
型號(hào)： AT90USB647-MU
廠商： Atmel
文件頁(yè)數(shù)： 80/106頁(yè)
文件大?。?/td> 0K
描述： IC AVR MCU 64K 64QFN
產(chǎn)品培訓(xùn)模塊： megaAVR Introduction
標(biāo)準(zhǔn)包裝： 1,300
系列： AVR®
應(yīng)用： USB 微控制器
核心處理器： AVR
程序存儲(chǔ)器類型： 閃存（64 kB）
控制器系列： AT90 USB
RAM 容量： 4K x 8
接口： 2 線串行，SPI 串行，USART，USB
輸入/輸出數(shù)： 48
電源電壓： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 64-VFQFN 裸露焊盤
包裝： 托盤
供應(yīng)商設(shè)備封裝： 64-VQFN（9x9）
配用： ATSTK600-TQFP64-ND - STK600 SOCKET/ADAPTER 64-TQFP
ATSTK525-ND - KIT STARTER FOR AT90USB
AT90USBKEY2-ND - KIT DEMO FOR AT90USB
其它名稱： AT90USB647-16MU
AT90USB647-16MU-ND
Q4939729A
75
7593L–AVR–09/12
AT90USB64/128
Note:
1. For the assembly program, two temporary registers are used to minimize the time from pull-
ups are set on pins 0, 1, 6, and 7, until the direction bits are correctly set, defining bit 2 and 3
as low and redefining bits 0 and 1 as strong high drivers.
11.2.5
Digital input enable and sleep modes
As shown in Figure 11-2 on page 72, the digital input signal can be clamped to ground at the
input of the schmitt-trigger. The signal denoted SLEEP in the figure, is set by the MCU Sleep
Controller in Power-down mode, Power-save mode, and Standby mode to avoid high power
consumption if some input signals are left floating, or have an analog signal level close to V
CC/2.
SLEEP is overridden for port pins enabled as external interrupt pins. If the external interrupt
request is not enabled, SLEEP is active also for these pins. SLEEP is also overridden by various
other alternate functions as described in “Alternate port functions” on page 76.
If a logic high level (“one”) is present on an asynchronous external interrupt pin configured as
“Interrupt on Rising Edge, Falling Edge, or Any Logic Change on Pin” while the external interrupt
is not enabled, the corresponding External Interrupt Flag will be set when resuming from the
above mentioned Sleep mode, as the clamping in these sleep mode produces the requested
logic change.
11.2.6
Unconnected pins
If some pins are unused, it is recommended to ensure that these pins have a defined level. Even
though most of the digital inputs are disabled in the deep sleep modes as described above, float-
Assembly code example
...
; Define pull-ups and set outputs high
; Define directions for port pins
ldi
r16,(1<<PB7)|(1<<PB6)|(1<<PB1)|(1<<PB0)
ldi
r17,(1<<DDB3)|(1<<DDB2)|(1<<DDB1)|(1<<DDB0)
out
PORTB,r16
out
DDRB,r17
; Insert nop for synchronization
nop
; Read port pins
in
r16,PINB
...
C code example
unsigned char
i;
...
/* Define pull-ups and set outputs high */
/* Define directions for port pins */
PORTB = (1<<PB7)|(1<<PB6)|(1<<PB1)|(1<<PB0);
DDRB = (1<<DDB3)|(1<<DDB2)|(1<<DDB1)|(1<<DDB0);
/* Insert nop for synchronization*/
__no_operation();
/* Read port pins */
i = PINB;
...
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT90USB647-MUR 功能描述:8位微控制器 -MCU USB 64K FLASH 16 MHz RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90USB64X 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB DFU Bootloader
AT90USB82 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 8/16K Bytes of ISP Flash and USB Controller
AT90USB82_0811 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 8/16K Bytes of ISP Flash and USB Controller
AT90USB82-16MU 功能描述:8位微控制器 -MCU AVR USB 8K FLASH RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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