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      參數(shù)資料
      型號(hào)： M37270MF-101SP
      廠商： Mitsubishi Electric Corporation
      英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
      中文描述： 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器
      文件頁(yè)數(shù)： 37/94頁(yè)
      文件大?。?/td> 1551K
      代理商： M37270MF-101SP
      MITSUBISHI MICROCOMPUTERS
      M37270MF-XXXSP
      M37270EF-XXXSP, M37270EFSP
      SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
      and ON-SCREEN DISPLAY CONTROLLER
      37
      (1) I
      2
      C Data Shift Register
      The I
      2
      C data shift register (S0 : address 00F6
      16
      ) is an 8-bit shift
      register to store receive data and write transmit data.
      When transmit data is written into this register, it is transferred to the
      outside from bit 7 in synchronization with the SCL clock, and each
      time one-bit data is output, the data of this register are shifted one bit
      to the left. When data is received, it is input to this register from bit 0
      in synchronization with the SCL clock, and each time one-bit data is
      input, the data of this register are shifted one bit to the left.
      The I
      2
      C data shift register is in a write enable status only when the
      ES0 bit of the I
      2
      C control register (address 00F9
      16
      ) is “1.” The bit
      counter is reset by a write instruction to the I
      2
      C data shift register.
      When both the ES0 bit and the MST bit of the I
      2
      C status register
      (address 00F8
      16
      ) are “1,” the SCL is output by a write instruction to
      the I
      2
      C data shift register. Reading data from the I
      2
      C data shift regis-
      ter is always enabled regardless of the ES0 bit value.
      Note:
      To write data into the I
      2
      C data shift register after setting the
      MST bit to “0” (slave mode), keep an interval of 8 machine
      cycles or more.
      (2) I
      2
      C Address Register
      The I
      2
      C address register (address 00F7
      16
      ) consists of a 7-bit slave
      address and a
      read
      /write bit. In the addressing mode, the slave ad-
      dress written in this register is compared with the address data to be
      received immediately after the START condition are detected.
      I
      Bit 0:
      Read
      /write bit (RBW)
      Not used in the 7-bit addressing mode. In the 10-bit addressing mode,
      the first address data to be received is compared with the contents
      (SAD6 to SAD0 + RBW) of the I
      2
      C address register.
      The RBW bit is cleared to “0” automatically when the stop condition
      is detected.
      I
      Bits 1 to 7: Slave address (SAD0–SAD6)
      These bits store slave addresses. Regardless of the 7-bit address-
      ing mode and the 10-bit addressing mode, the address data trans-
      mitted from the master is compared with the contents of these bits.
      (3) I
      2
      C Clock Control Register
      The I
      2
      C clock control register (address 00FA
      16
      ) is used to set ACK
      control, SCL mode and SCL frequency.
      I
      Bits 0 to 4: SCL frequency control bits (CCR0–CCR4)
      These bits control the SCL frequency. Refer to Table 7.
      I
      Bit 5: SCL mode specification bit (FAST MODE)
      This bit specifies the SCL mode. When this bit is set to “0,” the stan-
      dard clock mode is set. When the bit is set to “1,” the high-speed
      clock mode is set.
      I
      Bit 6: ACK bit (ACK BIT)
      This bit sets the SDA status when an ACK clock
      8
      is generated. When
      this bit is set to “0,” the ACK return mode is set and make SDA “L” at
      the occurrence of an ACK clock. When the bit is set to “1,” the ACK
      non-return mode is set. The SDA is held in the “H” status at the oc-
      currence of an ACK clock.
      However, when the slave address matches the address data in the
      reception of address data at ACK BIT = “0,” the SDA is automatically
      made “L” (ACK is returned). If there is a mismatch between the slave
      address and the address data, the SDA is automatically made
      “H”(ACK is not returned).
      8
      ACK clock: Clock for acknowledgement
      I
      Bit 7: ACK clock bit (ACK)
      This bit specifies a mode of acknowledgment which is an acknowl-
      edgment response of data transmission. When this bit is set to “0,”
      the no ACK clock mode is set. In this case, no ACK clock occurs
      after data transmission. When the bit is set to “1,” the ACK clock
      mode is set and the master generates an ACK clock upon comple-
      tion of each 1-byte data transmission.The device for transmitting
      address data and control data releases the SDA at the occurrence of
      an ACK clock (make SDA “H”) and receives the ACK bit generated
      by the data receiving device.
      Note:
      Do not write data into the I
      2
      C clock control register during
      transmitting. If data is written during transmitting, the I
      2
      C clock
      generator is reset, so that data cannot be transmitted nor-
      mally.
      Fig. 37. Structure of I
      2
      C address register
      SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW
      Slave address
      I
      2
      C address register
      (S0D: address 00F7
      16
      )
      Read/write bit
      7
      0
      相關(guān)PDF資料
      PDF描述
      M37270MF-103SP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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      M37271EF-XXXSP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
      相關(guān)代理商/技術(shù)參數(shù)
      參數(shù)描述
      M37270MF-103SP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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      M37270MF107SP 制造商:MITS 功能描述:*
      M37270MF-167SP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
      M37270MF-168SP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
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