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AT89C5122D-RDRUM bảng dữ liệu(PDF) 51 Page - ATMEL Corporation

tên linh kiện AT89C5122D-RDRUM
Giải thích chi tiết về linh kiện  C51 Microcontroller with USB and Smart Card Reader Interfaces
PDF  208 Pages
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nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
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AT89C5122D-RDRUM bảng dữ liệu(HTML) 51 Page - ATMEL Corporation

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51
AT83R5122, AT8xC5122/23
4202F–SCR–07/2008
I/O Port Definition
Ports vs Packages
Table 30.
I/O Number vs Packages
Port 0
Port 0 has the following functions:
–
Default function: Port 0 is an 8-bit I/O port.
–
Alternate function: Port 0 is also the multiplexed low-order address and data
bus during accesses to external Program and Data Memory. In this
application, it uses strong internal pull-ups when emitting 1’s and it can drive
CMOS inputs without external pull-ups.
Port 0 has the following configurations:
–
Default configuration: open drain bi-directional I/O port. Port 0 pins that have
1’s written to them float, and in this state they can be used as high-
impedance inputs.
–
Configuration 2: Low speed output, “KB_OUT”
–
Configuration 3: Push-pull output
P0
P1
P2
P3
P4
P5
Total
VQFP64
QFN64
88886
8
46
VQFP32
QFN32
-8
-8-
1
17
PLCC28
-
6
-
6
-
1
13



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