參數(shù)資料
    型號: ATMEGA324PA-AU
    廠商: Atmel
    文件頁數(shù): 158/160頁
    文件大?。?/td> 0K
    描述: MCU AVR 32K FLASH 20MHZ 44-TQFP
    產(chǎn)品培訓模塊: MCU Product Line Introduction
    megaAVR Introduction
    標準包裝: 160
    系列: AVR® ATmega
    核心處理器: AVR
    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/復位,POR,PWM,WDT
    輸入/輸出數(shù): 32
    程序存儲器容量: 32KB(16K x 16)
    程序存儲器類型: 閃存
    EEPROM 大?。?/td> 1K x 8
    RAM 容量: 2K x 8
    電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 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
    配用: ATSTK600-RC31-ND - STK600 ROUTING CARD AVR
    ATSTK600-ND - DEV KIT FOR AVR/AVR32
    97
    8272E–AVR–04/2013
    ATmega164A/PA/324A/PA/644A/PA/1284/P
    generation. Similarly, do not write the TCNT0 value equal to BOTTOM when the counter is
    down-counting.
    The setup of the OC0x should be performed before setting the Data Direction Register for the
    port pin to output. The easiest way of setting the OC0x value is to use the Force Output Com-
    pare (FOC0x) strobe bits in Normal mode. The OC0x Registers keep their values even when
    changing between Waveform Generation modes.
    Be aware that the COM0x1:0 bits are not double buffered together with the compare value.
    Changing the COM0x1:0 bits will take effect immediately.
    15.6
    Compare Match Output unit
    The Compare Output mode (COM0x1:0) bits have two functions. The Waveform Generator uses
    the COM0x1:0 bits for defining the Output Compare (OC0x) state at the next Compare Match.
    Also, the COM0x1:0 bits control the OC0x pin output source. Figure 15-4 shows a simplified
    schematic of the logic affected by the COM0x1:0 bit setting. The I/O Registers, I/O bits, and I/O
    pins in the figure are shown in bold. Only the parts of the general I/O Port Control Registers
    (DDR and PORT) that are affected by the COM0x1:0 bits are shown. When referring to the
    OC0x state, the reference is for the internal OC0x Register, not the OC0x pin. If a system reset
    occur, the OC0x Register is reset to “0”.
    Figure 15-4. Compare Match Output unit, schematic.
    The general I/O port function is overridden by the Output Compare (OC0x) from the Waveform
    Generator if either of the COM0x1:0 bits are set. However, the OC0x pin direction (input or out-
    put) is still controlled by the Data Direction Register (DDR) for the port pin. The Data Direction
    Register bit for the OC0x pin (DDR_OC0x) must be set as output before the OC0x value is visi-
    ble on the pin. The port override function is independent of the Waveform Generation mode.
    The design of the Output Compare pin logic allows initialization of the OC0x state before the out-
    put is enabled. Note that some COM0x1:0 bit settings are reserved for certain modes of
    PORT
    DDR
    DQ
    OCnx
    Pin
    OCnx
    DQ
    Waveform
    Generator
    COMnx1
    COMnx0
    0
    1
    D
    ATA
    B
    U
    S
    FOCn
    clk
    I/O
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