htrc110 NXP Semiconductors, htrc110 Datasheet - Page 10

• Manufacturer Part Number: htrc110
• Description: Hitag Reader Chip
• Manufacturer: NXP Semiconductors

July 2006
HTRC110 Hitag Reader Chip
Rev. 3.0
All commands are transmitted to the HTRC110 serial interface starting with Most Significant Bit
(MSB). DIN and DOUT are valid when SCLK is high.
8.8.
Glitch Filter for Increased Noise/Interference Immunity
Connecting Pin 5 (MODE) to VDD enables digital filtering of the SCLK and the DIN input signals.
This mode offers improved immunity against glitches on these interface signals. It is intended to be
used in the so called “Active Antenna Applications” where the microcontroller and the reader com-
municate via long signal lines (e.g. 1 meter).
In other applications Pin 5 (MODE) has to be connected to GND.
Please refer to the HTRC110 application note for a detailed description of this feature.
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