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  • 參數(shù)資料
    型號: PIC16CE625-20I/SS
    廠商: Microchip Technology
    文件頁數(shù): 34/100頁
    文件大?。?/td> 0K
    描述: IC MCU OTP 2KX14 EE COMP 20SSOP
    產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
    標(biāo)準(zhǔn)包裝: 67
    系列: PIC® 16C
    核心處理器: PIC
    芯體尺寸: 8-位
    速度: 20MHz
    外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
    輸入/輸出數(shù): 13
    程序存儲器容量: 3.5KB(2K x 14)
    程序存儲器類型: OTP
    EEPROM 大?。?/td> 128 x 8
    RAM 容量: 128 x 8
    電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
    振蕩器型: 外部
    工作溫度: -40°C ~ 85°C
    封裝/外殼: 20-SSOP(0.209",5.30mm 寬)
    包裝: 管件
    配用: 309-1016-ND - ADAPTER 20-SSOP TO 18-DIP
    1999 Microchip Technology Inc.
    DS40182C-page 29
    PIC16CE62X
    6.0
    EEPROM PERIPHERAL
    OPERATION
    The PIC16CE623/624/625 each have 128 bytes of
    EEPROM data memory. The EEPROM data memory
    supports a bi-directional, 2-wire bus and data transmis-
    sion protocol. These two-wires are serial data (SDA)
    and serial clock (SCL), and are mapped to bit1 and bit2,
    respectively, of the EEINTF register (SFR 90h). In addi-
    tion, the power to the EEPROM can be controlled using
    bit0 (EEVDD) of the EEINTF register.
    For most appli-
    cations, all that is required is calls to the following func-
    tions:
    ; Byte_Write: Byte write routine
    ;
    Inputs: EEPROM Address
    EEADDR
    ;
    EEPROM Data
    EEDATA
    ;
    Outputs:
    Return 01 in W if OK, else
    ;
    return 00 in W
    ;
    ; Read_Current: Read EEPROM at address
    currently held by EE device.
    ;
    Inputs: NONE
    ;
    Outputs:
    EEPROM Data
    EEDATA
    ;
    Return 01 in W if OK, else
    ;
    return 00 in W
    ;
    ; Read_Random: Read EEPROM byte at supplied
    ; address
    ;
    Inputs: EEPROM Address
    EEADDR
    ;
    Outputs:
    EEPROM Data
    EEDATA
    ;
    Return 01 in W if OK,
    ;
    else return 00 in W
    The code for these functions is available on our web
    site (www.microchip.com). The code will be accessed
    by either including the source code FL62XINC.ASM or
    by linking FLASH62X.ASM. FLASH62.IMC provides
    external definition to the calling program.
    6.0.1
    SERIAL DATA
    SDA is a bi-directional pin used to transfer addresses
    and data into and data out of the memory.
    For normal data transfer, SDA is allowed to change only
    during SCL low. Changes during SCL high are
    reserved for indicating the START and STOP condi-
    tions.
    6.0.2
    SERIAL CLOCK
    This SCL input is used to synchronize the data transfer
    to and from the memory.
    6.0.3
    EEINTF REGISTER
    The EEINTF register (SFR 90h) controls the access to
    the EEPROM. Register 6-1 details the function of each
    bit. User code must generate the clock and data sig-
    nals.
    REGISTER 6-1: EEINTF REGISTER (ADDRESS 90h)
    U-0
    R/W-1
    EESCL
    EESDA
    EEVDD
    R
    = Readable bit
    W = Writable bit
    U
    = Unimplemented bit,
    read as ‘0’
    - n = Value at POR reset
    bit7
    bit0
    bit 7-3:
    Unimplemented: Read as ’0’
    bit 2:
    EESCL: Clock line to the EEPROM
    1
    = Clock high
    0
    = Clock low
    bit 1:
    EESDA: Data line to EEPROM
    1
    = Data line is high (pin is tri-stated, line is pulled high by a pull-up resistor)
    0
    = Data line is low
    bit 0:
    EEVDD: VDD control bit for EEPROM
    1
    = VDD is turned on to EEPROM
    0
    = VDD is turned off to EEPROM (all pins are tri-stated and the EEPROM is powered down)
    Note:
    EESDA, EESCL and EEVDD will read ‘0’ if EEVDD is turned off.
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