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參數(shù)資料
| 型號： | EM78P451S |
| 廠商： | ELAN Microelctronics Corp . |
| 英文描述： | Quad, Serial, 8-Bit DACs with Rail-to-Rail Outputs |
| 中文描述： | 8位微控制器的OTP ROM的 |
| 文件頁數(shù)： | 21/54頁 |
| 文件大?。?/td> | 421K |
| 代理商： | EM78P451S |
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EM78P451S
8-Bit Microcontroller with OTP ROM
Product Specification (V1.0) 06.01.2004
(This specification is subject to change without further notice)
17
4.5 SERIAL PERIPHERAL INTERFACE MODE
4.5.1 Overview & Features
Overview:
Figures 8, 9, and 10 show how EM78P451S communicates with other devices through
SPI module. If EM78P451S 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
EM78P451S is 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.
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
SPIW Reg
Master Device
Fig. 8 SPI Master/Slave Communication
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