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参数资料
型号： AT90USB1287-MUR
厂商： Atmel
文件页数： 80/106页
文件大小： 0K
描述： MCU AVR 128K FLASH 16MHZ 64QFN
产品培训模块： MCU Product Line Introduction
megaAVR Introduction
标准包装： 1,000
系列： AVR® 90USB
核心处理器： AVR
芯体尺寸： 8-位
速度： 16MHz
连通性： EBI/EMI，I²C，SPI，UART/USART，USB，USB OTG
外围设备： 欠压检测/复位，POR，PWM，WDT
输入/输出数： 48
程序存储器容量： 128KB（128K x 8）
程序存储器类型： 闪存
EEPROM 大小： 4K x 8
RAM 容量： 8K x 8
电压 - 电源 (Vcc/Vdd)： 2.7 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-VFQFN 裸露焊盘
包装： 带卷 (TR)
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
(1)
...
; 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;
...
相关PDF资料
PDF描述
AT90USB1287-AUR MCU AVR 128K FLASH 16MHZ 64TQFP
VE-BTF-IX CONVERTER MOD DC/DC 72V 75W
VI-B3X-IX-F2 CONVERTER MOD DC/DC 5.2V 75W
VE-BTF-IW CONVERTER MOD DC/DC 72V 100W
VI-B3X-IW-F4 CONVERTER MOD DC/DC 5.2V 100W
相关代理商/技术参数
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AT90USB162-16AU 功能描述:8位微控制器 -MCU AVR USB 16K FLASH RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT90USB162-16AUR 功能描述:8位微控制器 -MCU 16K Flash RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
AT90USB162-16MU 功能描述:8位微控制器 -MCU AVR USB 16K FLASH RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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