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EM78451AP bảng dữ liệu(PDF) 21 Page - ELAN Microelectronics Corp

tên linh kiện EM78451AP
Giải thích chi tiết về linh kiện  8-Bit Microcontroller
PDF  54 Pages
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nhà sản xuất  EMC [ELAN Microelectronics Corp]
Trang chủ  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM78451AP bảng dữ liệu(HTML) 21 Page - ELAN Microelectronics Corp

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EM78451
8-Bit Microcontroller
Product Specification (V1.2) 05.27.2004
• 17
(This specification is subject to change without further notice)
PDRD
Q
Q
CLK
D
P
R
C
L
PCWR
PDWR
Q
Q
CLK
D
P
R
C
L
0
1
M
U
X
IOD
ROC
VCC
Weakly
Pull-up
PORT
Rex*
*The Rex is 560K ohm external resistor
PCRD
Fig. 7 (b) The Circuit of I/O Port with R-option (P80, P81)
4.5 SERIAL PERIPHERAL INTERFACE MODE
4.5.1
Overview & Features
Overview:
Figure 8, 9, and 10 shows how the EM78451 communicates with other devices through
the SPI module. If EM78451 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
EM78451 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,



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