參數(shù)資料
型號： AT32UC3A0512
廠商： Atmel Corp.
英文描述： AVR32 32-Bit Microcontroller
中文描述： AVR32 32位微控制器
文件頁數(shù)： 67/109頁
文件大小： 10824K
代理商： AT32UC3A0512
46
ATtiny20 [DATASHEET]
8235E–AVR–03/2013
When reading back a software assigned pin value, a nop instruction must be inserted as indicated in Figure 10-5 on page
46. The out instruction sets the “SYNC LATCH” signal at the positive edge of the clock. In this case, the delay tpd through
the synchronizer is one system clock period.
Figure 10-5. Synchronization when Reading a Software Assigned Pin Value
10.2.5 Digital Input Enable and Sleep Modes
As shown in Figure 10-2 on page 43, 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 and Standby modes to avoid
high power consumption if some input signals are left floating, or have an analog signal level close to VCC/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
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.
10.2.6 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, floating inputs should be avoided to reduce
current consumption in all other modes where the digital inputs are enabled (Reset, Active mode and Idle mode).
The simplest method to ensure a defined level of an unused pin, is to enable the internal pull-up. In this case, the pull-up
will be disabled during reset. If low power consumption during reset is important, it is recommended to use an external
pull-up or pulldown. Connecting unused pins directly to VCC or GND is not recommended, since this may cause
excessive currents if the pin is accidentally configured as an output.
out PORTx, r16
nop
in r17, PINx
0xFF
0x00
0xFF
SYSTEM CLK
r16
INSTRUCTIONS
SYNC LATCH
PINxn
r17
t
pd
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參數(shù)描述
AT32UC3A0512_08 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AVR32 32-Bit Microcontroller
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AT32UC3A0512-ALTES 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:AVR32 32-Bit Microcontroller
AT32UC3A0512-ALTR 功能描述:MCU AVR32 512K FLASH 144LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:AVR®32 UC3 A0 標(biāo)準(zhǔn)包裝:1,500 系列:AVR® ATtiny 核心處理器:AVR 芯體尺寸:8-位 速度:16MHz 連通性:I²C，LIN，SPI，UART/USART，USI 外圍設(shè)備:欠壓檢測/復(fù)位，POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):16 程序存儲器容量:8KB（4K x 16） 程序存儲器類型:閃存 EEPROM 大小:512 x 8 RAM 容量:512 x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 11x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:帶卷 (TR)
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