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    參數(shù)資料
    型號(hào): PIC16F628-20I/P
    廠商: Microchip Technology
    文件頁(yè)數(shù): 159/170頁(yè)
    文件大小: 0K
    描述: IC MCU FLASH 2KX14 COMP 18DIP
    產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
    8-bit PIC® Microcontroller Portfolio
    標(biāo)準(zhǔn)包裝: 25
    系列: PIC® 16F
    核心處理器: PIC
    芯體尺寸: 8-位
    速度: 20MHz
    連通性: UART/USART
    外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
    輸入/輸出數(shù): 16
    程序存儲(chǔ)器容量: 3.5KB(2K x 14)
    程序存儲(chǔ)器類(lèi)型: 閃存
    EEPROM 大小: 128 x 8
    RAM 容量: 224 x 8
    電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
    振蕩器型: 內(nèi)部
    工作溫度: -40°C ~ 85°C
    封裝/外殼: 18-DIP(0.300",7.62mm)
    包裝: 管件
    配用: DVA16XP183-ND - ADAPTER ICE 18DIP/SOIC/SSOP
    AC164010-ND - MODULE SKT PROMATEII DIP/SOIC
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    2003 Microchip Technology Inc.
    Preliminary
    DS40300C-page 87
    PIC16F62X
    13.0 DATA EEPROM MEMORY
    The EEPROM data memory is readable and writable
    during normal operation (full V
    DD range). This memory
    is not directly mapped in the register file space. Instead
    it is indirectly addressed through the Special Function
    Registers (SFRs). There are four SFRs used to read
    and write this memory. These registers are:
    EECON1
    EECON2 (Not a physically implemented register)
    EEDATA
    EEADR
    EEDATA holds the 8-bit data for read/write, and
    EEADR holds the address of the EEPROM location
    being accessed. PIC16F62X devices have 128 bytes of
    data EEPROM with an address range from 0h to 7Fh.
    The EEPROM data memory allows byte read and write.
    A byte write automatically erases the location and
    writes the new data (erase before write). The EEPROM
    data memory is rated for high erase/write cycles. The
    write time is controlled by an on-chip timer. The write-
    time will vary with voltage and temperature as well as
    from chip to chip. Please refer to AC specifications for
    exact limits.
    When the device is code protected, the CPU may
    continue to read and write the data EEPROM memory.
    The device programmer can no longer access
    this memory.
    Additional information on the Data EEPROM is
    available in the PICmicro Mid-Range Reference
    Manual, (DS33023).
    REGISTER 13-1:
    EEADR REGISTER (ADDRESS: 9Bh)
    13.1
    EEADR
    The EEADR register can address up to a maximum of
    256 bytes of data EEPROM. Only the first 128 bytes of
    data EEPROM are implemented and only seven of the
    eight bits in the register (EEADR<6:0>) are required.
    The upper bit is address decoded. This means that this
    bit should always be '0' to ensure that the address is in
    the 128 byte memory space.
    13.2
    EECON1 AND EECON2
    REGISTERS
    EECON1 is the control register with five low order bits
    physically implemented. The upper-three bits are non-
    existent and read as '0's.
    Control bits RD and WR initiate read and write,
    respectively. These bits cannot be cleared, only set, in
    software. They are cleared in hardware at completion
    of the read or write operation. The inability to clear the
    WR bit in software prevents the accidental, premature
    termination of a write operation.
    The WREN bit, when set, will allow a write operation.
    On power-up, the WREN bit is clear. The WRERR bit is
    set when a write operation is interrupted by a MCLR
    Reset or a WDT Timeout Reset during normal
    operation. In these situations, following RESET, the
    user can check the WRERR bit and rewrite the
    location. The data and address will be unchanged in
    the EEDATA and EEADR registers.
    Interrupt flag bit EEIF in the PIR1 register is set when
    write is complete. This bit must be cleared in software.
    EECON2 is not a physical register. Reading EECON2
    will read all '0's. The EECON2 register is used
    exclusively in the Data EEPROM write sequence.
    R/W
    Reserved
    EADR6
    EADR5
    EADR4
    EADR3
    EADR2
    EADR1
    EADR0
    bit 7
    bit 0
    bit 7
    Unimplemented Address: Must be set to ‘0’
    bit 6-0
    EEADR: Specifies one of 128 locations of EEPROM Read/Write Operation
    Legend:
    R = Readable bit
    W = Writable bit
    U = Unimplemented bit, read as ‘0’
    -n = Value at POR
    ’1’ = Bit is set
    ’0’ = Bit is cleared
    x = Bit is unknown
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