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MFRC63002R bảng dữ liệu(PDF) 59 Page - NXP Semiconductors

tên linh kiện MFRC63002R
Giải thích chi tiết về linh kiện  Contactless reader IC
PDF  118 Pages
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nhà sản xuất  NXP [NXP Semiconductors]
Trang chủ  http://www.nxp.com
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MFRC63002R bảng dữ liệu(HTML) 59 Page - NXP Semiconductors

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MFRC630
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.1 — 6 September 2012
227531
59 of 118
NXP Semiconductors
MFRC630
Contactless reader IC
Table 46.
WaterLevel bits
Bit
Symbol
Description
7 to 0
WaterLevel
Sets a level to indicate a FIFO-buffer state which can be read from bits
HighAlert and LowAlert in the FifoControl. In 512-bit FIFO mode, the
register is extended by bit WaterLevel in the FIFOControl. This
functionality can be used to avoid a FIFO buffer overflow or underflow:
The bit HiAlert bit in FIFO Control is read logic 1, if the number of bytes
in the FIFO-buffer is equal or less than the number defined by
WaterLevel.
The bit LoAlert bit in FIFO control is read logic 1, if the number of bytes
in the FIFO buffer is equal or less than the number defined by
WaterLevel.
Note: For the calculation of HiAlert and LoAlert see register description
of these bits (Section 9.4.1 “FIFOControl”).



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