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    參數(shù)資料
    型號(hào): C8051F000R
    廠商: Silicon Laboratories Inc
    文件頁(yè)數(shù): 12/171頁(yè)
    文件大?。?/td> 0K
    描述: IC 8051 MCU 32K FLASH 64TQFP
    標(biāo)準(zhǔn)包裝: 1
    系列: C8051F00x
    核心處理器: 8051
    芯體尺寸: 8-位
    速度: 20MHz
    連通性: SMBus(2 線/I²C),SPI,UART/USART
    外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,溫度傳感器,WDT
    輸入/輸出數(shù): 32
    程序存儲(chǔ)器容量: 32KB(32K x 8)
    程序存儲(chǔ)器類(lèi)型: 閃存
    RAM 容量: 256 x 8
    電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
    數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b,D/A 2x12b
    振蕩器型: 內(nèi)部
    工作溫度: -40°C ~ 85°C
    封裝/外殼: 64-TQFP
    包裝: 剪切帶 (CT)
    其它名稱: 336-1000-1
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    C8051F000/1/2/5/6/7
    C8051F010/1/2/5/6/7
    15.3.
    General Purpose Port I/O
    Each MCU has four byte-wide, bi-directional parallel ports that can be used general purpose I/O. Each port is
    accessed through a corresponding special function register (SFR) that is both byte addressable and bit addressable.
    When writing to a port, the value written to the SFR is latched to maintain the output data value at each pin. When
    reading, the logic levels of the port’s input pins are returned regardless of the XBRn settings (i.e. even when the pin
    is assigned to another signal by the Crossbar, the Port Register can always still read its corresponding Port I/O pin).
    The exception to this is the execution of the read-modify-write instructions. The read-modify-write instructions
    when operating on a port SFR are the following: ANL, ORL, XRL, JBC, CPL, INC, DEC, DJNZ and MOV, CLR
    or SET, when the destination is an individual bit in a port SFR. For these instructions, the value of the port register
    (not the pin) is read, modified, and written back to the SFR.
    15.4.
    Configuring Ports Which are not Pinned Out
    P2 and P3 are not pinned out on the F001/06/11/16. P1, P2, and P3 are not pinned out on the F002/07/12/17. These
    port registers (and corresponding interrupts, where applicable) are still available for software use in these reduced
    pin count MCUs. Whether used or not in software, it is recommended not to let these port drivers go to high
    impedance state. This is prevented after reset by having the weak pull-ups enabled as described in the XBR2
    register. It is recommended that each output driver for ports not pinned out should be configured as push-pull using
    the corresponding PRTnCF register. This will inhibit a high impedance state even if the weak pull-up is disabled.
    Figure 15.6. P0: Port0 Register
    R/W
    Reset Value
    P0.7
    P0.6
    P0.5
    P0.4
    P0.3
    P0.2
    P0.1
    P0.0
    11111111
    Bit7
    Bit6
    Bit5
    Bit4
    Bit3
    Bit2
    Bit1
    Bit0
    SFR Address:
    (bit addressable)
    0x80
    Bits7-0: P0.[7:0]
    (Write – Output appears on I/O pins per XBR0, XBR1, and XBR2 Registers)
    0: Logic Low Output.
    1: Logic High Output (high-impedance if corresponding PRT0CF.n bit = 0)
    (Read – Regardless of XBR0, XBR1, and XBR2 Register settings).
    0: P0.n pin is logic low.
    1: P0.n pin is logic high.
    Figure 15.7. PRT0CF: Port0 Configuration Register
    R/W
    Reset Value
    00000000
    Bit7
    Bit6
    Bit5
    Bit4
    Bit3
    Bit2
    Bit1
    Bit0
    SFR Address:
    0xA4
    Bits7-0: PRT0CF.[7:0]: Output Configuration Bits for P0.7-P0.0 (respectively)
    0: Corresponding P0.n Output mode is Open-Drain.
    1: Corresponding P0.n Output mode is Push-Pull.
    (Note:
    When SDA, SCL, and RX appear on any of the P0 I/O, each are open-drain
    regardless of the value of PRT0CF).
    109
    Rev. 1.7
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