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    參數(shù)資料
    型號: AT89LP6440-20AU
    廠商: Atmel
    文件頁數(shù): 131/200頁
    文件大小: 0K
    描述: MCU 8051 64K FLASH ISP 44TQFP
    產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
    標(biāo)準(zhǔn)包裝: 160
    系列: 89LP
    核心處理器: 8051
    芯體尺寸: 8-位
    速度: 20MHz
    連通性: I²C,SPI,UART/USART
    外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
    輸入/輸出數(shù): 38
    程序存儲器容量: 64KB(64K x 8)
    程序存儲器類型: 閃存
    EEPROM 大?。?/td> 8K x 8
    RAM 容量: 4.25K x 8
    電壓 - 電源 (Vcc/Vdd): 2.4 V ~ 3.6 V
    數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
    振蕩器型: 內(nèi)部
    工作溫度: -40°C ~ 85°C
    封裝/外殼: 44-TQFP
    包裝: 托盤
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    36
    3706C–MICRO–2/11
    AT89LP3240/6440
    Note:
    During a power-up sequence, the fuse selection is always overridden and therefore the pin will
    always function as a reset input. An external circuit connected to this pin should not hold this
    pin LOW during a power-on sequence if the pin will be configured as a general I/O, as this
    will keep the device in reset until the pin transitions high. After the power-up delay, this input
    will function either as an external reset input or as a digital input as defined by the fuse bit. Only a
    power-up reset will temporarily override the selection defined by the reset fuse bit. Other sources
    of reset will not override the reset fuse bit. P4.2/RST also serves as the In-System Programming
    (ISP) enable. ISP is enabled when the external reset pin is held low. When the reset pin is dis-
    abled by the fuse, ISP may only be entered by pulling P4.2 low during power-up.
    7.4
    Watchdog Reset
    When the Watchdog times out, it will generate an internal reset pulse lasting 16 clock cycles.
    Watchdog reset will also set the WDTOVF flag in WDTCON. To prevent a Watchdog reset, the
    watchdog reset sequence 1EH/E1H must be written to WDTRST before the Watchdog times
    out. See “Programmable Watchdog Timer” on page 141. for details on the operation of the
    Watchdog.
    7.5
    Software Reset
    The CPU may generate an internal 16-clock cycle reset pulse by writing the software reset
    sequence 5AH/A5H to the WDRST register. A software reset will set the SWRST bit in WDT-
    CON. See “Software Reset” on page 142 for more information on software reset. Writing any
    sequences other than 5AH/A5H or 1EH/E1H to WDTRST will generate an immediate reset and
    set both WDTOVF and SWRST to flag an error.
    8.
    Power Saving Modes
    The AT89LP3240/6440 supports two different power-reducing modes: Idle and Power-down.
    These modes are accessed through the PCON register. Additional steps may be required to
    achieve the lowest possible power consumption while using these modes.
    8.1
    Idle Mode
    Setting the IDL bit in PCON enters idle mode. Idle mode halts the internal CPU clock. The CPU
    state is preserved in its entirety, including the RAM, stack pointer, program counter, program
    status word, and accumulator. The Port pins hold the logic states they had at the time that Idle
    was activated. Idle mode leaves the peripherals running in order to allow them to wake up the
    CPU when an interrupt is generated. The timers, UART, SPI, TWI, comparators, ADC, GPI and
    CCA peripherals continue to function during Idle. If these functions are not needed during idle,
    they should be explicitly disabled by clearing the appropriate control bits in their respective
    SFRs. The watchdog may be selectively enabled or disabled during Idle by setting/clearing the
    WDIDLE bit. The Brown-out Detector, if enabled, is always active during Idle. Any enabled inter-
    rupt source or reset may terminate Idle mode. When exiting Idle mode with an interrupt, the
    interrupt will immediately be serviced, and following RETI the next instruction to be executed will
    be the one following the instruction that put the device into Idle.
    The power consumption during Idle mode can be further reduced by prescaling down the system
    clock using the System Clock Divider (Section 6.5 on page 32). Be aware that the clock divider
    will affect all peripheral functions except the ADC. Therefore baud rates or PWM periods may
    need to be adjusted to maintain their rate with the new clock frequency.
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    參數(shù)描述
    AT89LP6440-20JU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
    AT89LP6440-20MU 功能描述:8位微控制器 -MCU Single-Cycle 8051 64K ISP 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 最大時鐘頻率:50 MHz 程序存儲器大小: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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    AT89LP828-20AU 功能描述:8位微控制器 -MCU Single Cycle 8051 8K ISP Flash 2.4V-5.5V 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 最大時鐘頻率:50 MHz 程序存儲器大小: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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