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EM78P451 датащи(PDF) 21 Page - ELAN Microelectronics Corp

номер детали EM78P451
подробное описание детали  8-Bit Microcontroller with OTP ROM
PDF  54 Pages
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производитель  EMC [ELAN Microelectronics Corp]
домашняя страница  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78P451 датащи(HTML) 21 Page - ELAN Microelectronics Corp

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EM78P451
8-Bit Microcontroller with OTP ROM
Product Specification (V1.1) 06.30.2003
• 17
(This specification is subject to change without further notice)
4.5 SERIAL PERIPHERAL INTERFACE MODE
4.5.1 Overview & Features
4.5.1.1 Overview
Figures 8, 9, and 10 show how EM78P451 communicates with other devices through
SPI module. If EM78P451 is a master controller, it sends clock through the SCK pin. A
couple of 8-bit data are transmitted and received at the same time. However, if
EM78P451is defined as a slave, its SCK pin could be programmed as an input pin.
Data will continue to be shifted based on both the clock rate and the selected edge.
4.5.1.2 Features
Operation in either Master mode or Slave mode,
Three-wire or four-wire synchronous communication; that is, full duplex
Programmable baud rates of communication,
Programming clock polarity, (RD bit7)
Interrupt flag available for the read buffer full,
Up to 8 MHz ( maximum ) bit frequency,
SPI Module
SCK
SPIR Reg
SDI
SPIW
Reg
SPIS Reg
/SS
Slave Device
SDO
Bit 7
SPI Module
SPIR Reg
SPIW Reg
SPIS Reg
Master Device
Fig. 8 SPI Master/Slave Communication



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