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AT89C5122D-RDRUM bảng dữ liệu(PDF) 141 Page - ATMEL Corporation

tên linh kiện AT89C5122D-RDRUM
Giải thích chi tiết về linh kiện  C51 Microcontroller with USB and Smart Card Reader Interfaces
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AT89C5122D-RDRUM bảng dữ liệu(HTML) 141 Page - ATMEL Corporation

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AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
Mode Fault flag, MODF: This bit becomes set to indicate that the level on the SS is
inconsistent with the mode of the SPI. MODF with SSDIS reset, generates receiver/error
CPU interrupt requests.
Figure 88 gives a logical view of the above statements.
Figure 88.
SPI Interrupt Requests Generation
Registers
There are three registers in the module that provide control, status and data storage
functions. These registers are described in the following paragraphs.
Serial Peripheral Control
Register (SPCON)
The Serial Peripheral Control Register does the following:
•
Selects one of the Master clock rates
•
Configures the SPI module as Master or Slave
•
Selects serial clock polarity and phase
•
Enables the SPI module
•
Frees the SS pin for a general-purpose
SSDIS
MODF
CPU Interrupt Request
SPI Receiver/error
CPU Interrupt Request
SPI Transmitter
SPI
CPU Interrupt Request
SPIF



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