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AT89C51CC03U-RDTIM датащи(PDF) 132 Page - ATMEL Corporation

номер детали AT89C51CC03U-RDTIM
подробное описание детали  Enhanced 8-bit MCU with CAN Controller and Flash Memory
PDF  195 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51CC03U-RDTIM датащи(HTML) 132 Page - ATMEL Corporation

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AT89C51CC03
4182I–CAN–06/05
Functional Description
Figure 58 shows a detailed structure of the SPI Module.
Figure 58. SPI Module Block Diagram
Operating Modes
The Serial Peripheral Interface can be configured in one of the two modes: Master mode
or Slave mode. The configuration and initialization of the SPI Module is made through
two registers:
•
The Serial Peripheral Control register (SPCON)
•
The Serial Peripheral Status and Control Register (SPSCR)
Once the SPI is configured, the data exchange is made using:
•
The Serial Peripheral DATa register (SPDAT)
During an SPI transmission, data is simultaneously transmitted (shifted out serially) and
received (shifted in serially). A serial clock line (SCK) synchronizes shifting and sam-
pling on the two serial data lines (MOSI and MISO). A Slave Select line (SS) allows
individual selection of a Slave SPI device; Slave devices that are not selected do not
interfere with SPI bus activities.
Shift Register
0
1
2
3
4
5
6
7
Internal Bus
Pin
Control
Logic
MISO
MOSI
SCK
M
S
Clock
Logic
SPI Interrupt
8-bit bus
1-bit signal
SS
FCLK
Receive Data Register
SPDAT
SPI
Control
Transmit Data Register
-MODF
SPIF
OVR
SPTE
UARTM SPTEIE MODFIE
SPSCR
SPEN
MSTR
SPR2
SSDIS
CPOL CPHA
SPR1
SPR0
SPCON
Request
PERIPH



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