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    參數(shù)資料
    型號: PIC16C62BT-20E/SS
    廠商: Microchip Technology
    文件頁數(shù): 61/120頁
    文件大?。?/td> 0K
    描述: IC MCU OTP 2KX14 PWM 28SSOP
    標(biāo)準(zhǔn)包裝: 2,100
    系列: PIC® 16C
    核心處理器: PIC
    芯體尺寸: 8-位
    速度: 20MHz
    連通性: I²C,SPI
    外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
    輸入/輸出數(shù): 22
    程序存儲器容量: 3.5KB(2K x 14)
    程序存儲器類型: OTP
    RAM 容量: 128 x 8
    電壓 - 電源 (Vcc/Vdd): 4 V ~ 5.5 V
    振蕩器型: 外部
    工作溫度: -40°C ~ 125°C
    封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
    包裝: 帶卷 (TR)
    PIC16C62B/72A
    1999 Microchip Technology Inc.
    Preliminary
    DS35008B-page 45
    8.3.2
    MASTER OPERATION
    Master operation is supported in firmware using inter-
    rupt generation on the detection of the START and
    STOP conditions. The STOP (P) and START (S) bits
    are cleared by a reset or when the SSP module is dis-
    abled. The STOP (P) and START (S) bits will toggle
    based on the START and STOP conditions. Control of
    the I2C bus may be taken when the P bit is set, or the
    bus is idle and both the S and P bits are clear.
    In master operation, the SCL and SDA lines are manip-
    ulated in software by clearing the corresponding
    TRISC<4:3> bit(s). The output level is always low, irre-
    spective of the value(s) in PORTC<4:3>. So when
    transmitting data, a ’1’ data bit must have the
    TRISC<4> bit set (input) and a ’0’ data bit must have
    the TRISC<4> bit cleared (output). The same scenario
    is true for the SCL line with the TRISC<3> bit.
    The following events will cause SSP Interrupt Flag bit,
    SSPIF, to be set (SSP Interrupt if enabled):
    START condition
    STOP condition
    Byte transfer completed
    Master operation can be done with either the slave
    mode idle (SSPM3:SSPM0 = 1011) or with the slave
    active. When both master operation and slave modes
    are used, the software needs to differentiate the
    source(s) of the interrupt.
    For more information on master operation, see
    AN554
    - Software Implementation of I2C Bus Master.
    8.3.3
    MULTI-MASTER OPERATION
    In multi-master operation, the interrupt generation on
    the detection of the START and STOP conditions
    allows the determination of when the bus is free. The
    STOP (P) and START (S) bits are cleared from a reset
    or when the SSP module is disabled. The STOP (P)
    and START (S) bits will toggle based on the START and
    STOP conditions. Control of the I2C bus may be taken
    when bit P (SSPSTAT<4>) is set, or the bus is idle and
    both the S and P bits clear. When the bus is busy,
    enabling the SSP Interrupt will generate the interrupt
    when the STOP condition occurs.
    In multi-master operation, the SDA line must be moni-
    tored to see if the signal level is the expected output
    level. This check only needs to be done when a high
    level is output. If a high level is expected and a low level
    is present, the device needs to release the SDA and
    SCL lines (set TRISC<4:3>). There are two stages
    where this arbitration can be lost, these are:
    Address Transfer
    Data Transfer
    When the slave logic is enabled, the slave continues to
    receive. If arbitration was lost during the address trans-
    fer stage, communication to the device may be in
    progress. If addressed, an ACK pulse will be gener-
    ated. If arbitration was lost during the data transfer
    stage, the device will need to re-transfer the data at a
    later time.
    For more information on master operation, see
    AN578
    - Use of the SSP Module in the of I2C Multi-Master
    Environment.
    TABLE 8-3
    REGISTERS ASSOCIATED WITH I2C OPERATION
    Address
    Name
    Bit 7
    Bit 6
    Bit 5
    Bit 4
    Bit 3
    Bit 2
    Bit 1
    Bit 0
    Value on
    POR,
    BOR
    Value on
    all other
    resets
    0Bh, 8Bh
    INTCON
    GIE
    PEIE
    T0IE
    INTE
    RBIE
    T0IF
    INTF
    RBIF
    0000 000x
    0000 000u
    0Ch
    PIR1
    ADIF
    SSPIF
    CCP1IF TMR2IF TMR1IF
    -0-- 0000
    8Ch
    PIE1
    ADIE
    SSPIE CCP1IE TMR2IE TMR1IE
    -0-- 0000
    13h
    SSPBUF
    Synchronous Serial Port Receive Buffer/Transmit Register
    xxxx xxxx
    uuuu uuuu
    93h
    SSPADD
    Synchronous Serial Port (I2C mode) Address Register
    0000 0000
    14h
    SSPCON
    WCOL
    SSPOV SSPEN
    CKP
    SSPM3 SSPM2 SSPM1 SSPM0
    0000 0000
    94h
    SSPSTAT
    SMP(1)
    CKE(1)
    D/A
    PS
    R/W
    UA
    BF
    0000 0000
    87h
    TRISC
    PORTC Data Direction register
    1111 1111
    Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
    Shaded cells are not used by SSP module in SPI mode.
    Note 1:
    Maintain these bits clear in I2C mode.
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