CLRC663 Datasheet, PDF (65/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 54. 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”).
CLRC663
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 3 April 2012
171133
© NXP B.V. 2012. All rights reserved.
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