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11LC020-E/MS 데이터시트(PDF) 6 Page - Microchip Technology |
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11LC020-E/MS 데이터시트(HTML) 6 Page - Microchip Technology |
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6 / 38 page ![]() 11AAXXX/11LCXXX DS22067E-page 6 Preliminary © 2008 Microchip Technology Inc. 2.0 FUNCTIONAL DESCRIPTION 2.1 Principles of Operation The 11XX family of serial EEPROMs support the UNI/O® protocol. They can be interfaced with microcontrollers, including Microchip’s PIC® microcon- trollers, ASICs, or any other device with an available discrete I/O line that can be configured properly to match the UNI/O protocol. The 11XX devices contain an 8-bit instruction register. The devices are accessed via the SCIO pin. Table 4-1 contains a list of the possible instruction bytes and format for device operation. All instructions, addresses, and data are transferred MSb first, LSb last. Data is embedded into the I/O stream through Manchester encoding. The bus is controlled by a master device which determines the clock period, con- trols the bus access and initiates all operations, while the 11XX works as slave. Both master and slave can operate as transmitter or receiver, but the master device determines which mode is active. FIGURE 2-1: BLOCK DIAGRAM SCIO STATUS Register I/O Control Memory Control Logic X Dec HV Generator EEPROM Array Page Latches Y Decoder Sense Amp. R/W Control Logic Vcc Vss Current- Limited Slope Control |
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