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    參數(shù)資料
    型號(hào): MC68HC11F1CFN4
    廠商: Freescale Semiconductor
    文件頁數(shù): 29/158頁
    文件大?。?/td> 0K
    描述: IC MCU 512 EEPROM 4MHZ 68-PLCC
    標(biāo)準(zhǔn)包裝: 18
    系列: HC11
    核心處理器: HC11
    芯體尺寸: 8-位
    速度: 4MHz
    連通性: SCI,SPI
    外圍設(shè)備: POR,WDT
    輸入/輸出數(shù): 30
    程序存儲(chǔ)器類型: ROMless
    EEPROM 大?。?/td> 512 x 8
    RAM 容量: 1K x 8
    電壓 - 電源 (Vcc/Vdd): 4.75 V ~ 5.25 V
    數(shù)據(jù)轉(zhuǎn)換器: A/D 8x8b
    振蕩器型: 內(nèi)部
    工作溫度: -40°C ~ 85°C
    封裝/外殼: 68-LCC(J 形引線)
    包裝: 管件
    TIMING SYSTEM
    MC68HC11F1
    9-18
    TECHNICAL DATA
    9.6.3 Pulse Accumulator Status and Interrupt Bits
    The pulse accumulator control bits, PAOVI, PAII, PAOVF, and PAIF are located within
    timer registers TMSK2 and TFLG2.
    PAOVI and PAOVF — Pulse Accumulator Interrupt Enable and Overflow Flag
    The PAOVF status bit is set each time the pulse accumulator count rolls over from $FF
    to $00. To clear this status bit, write a one in the corresponding data bit position (bit 5)
    of the TFLG2 register. The PAOVI control bit allows configuring the pulse accumulator
    overflow for polled or interrupt-driven operation and does not affect the state of
    PAOVF. When PAOVI is zero, pulse accumulator overflow interrupts are inhibited, and
    the system operates in a polled mode, which requires that PAOVF be polled by user
    software to determine when an overflow has occurred. When the PAOVI control bit is
    set, a hardware interrupt request is generated each time PAOVF is set. Before leaving
    the interrupt service routine, software must clear PAOVF by writing to the TFLG2 reg-
    ister.
    PAII and PAIF — Pulse Accumulator Input Edge Interrupt Enable and Flag
    The PAIF status bit is automatically set each time a selected edge is detected at the
    PA7/PAI/OC1 pin. To clear this status bit, write to the TFLG2 register with a one in the
    corresponding data bit position (bit 4). The PAII control bit allows configuring the pulse
    accumulator input edge detect for polled or interrupt-driven operation but does not af-
    fect setting or clearing the PAIF bit. When PAII is zero, pulse accumulator input inter-
    rupts are inhibited, and the system operates in a polled mode. In this mode, the PAIF
    bit must be polled by user software to determine when an edge has occurred. When
    the PAII control bit is set, a hardware interrupt request is generated each time PAIF is
    set. Before leaving the interrupt service routine, software must clear PAIF by writing to
    the TFLG2 register.
    TMSK2 — Timer Interrupt Mask 2 Register
    $1024
    Bit 7
    654321
    Bit 0
    TOI
    RTII
    PAOVI
    PAII
    PR1
    PR0
    RESET:
    0000000
    0
    TFLG2 — Timer Interrupt Flag 2 Register
    $1025
    Bit 7
    654321
    Bit 0
    TOF
    RTIF
    PAOVF
    PAIF
    RESET:
    0000000
    0
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    Freescale Semiconductor, Inc.
    For More Information On This Product,
    Go to: www.freescale.com
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