| US 7,468,668 B2 | ||
| Semiconductor device for IC tag, IC tag, and control method for IC tag for detecting and executing command from radio wave | ||
| Kazuhiro Akiyama, Kanagawa (Japan); Hatsuhide Igarashi, Kanagawa (Japan); Seiichi Okamoto, Kanagawa (Japan); Toshiyuki Miyashita, Kanagawa (Japan); Kazumi Seki, Kanagawa (Japan); Tatsuya Uchino, Kanagawa (Japan); and Shigeki Kajimoto, Osaka (Japan) | ||
| Assigned to NEC Electronics Corporation, Kanagawa (Japan) | ||
| Filed on Jul. 28, 2005, as Appl. No. 11/191,040. | ||
| Claims priority of application No. 2004-222600 (JP), filed on Jul. 29, 2004. | ||
| Prior Publication US 2006/0022804 A1, Feb. 02, 2006 | ||
| Int. Cl. G08B 13/14 (2006.01); G08B 5/22 (2006.01); H04Q 9/00 (2006.01) | ||
| U.S. Cl. 340—572.1 [340/5.6; 340/5.61; 340/7.22; 340/539.1; 340/825.36] | 19 Claims |
| 1. A semiconductor device for an IC tag, comprising:
a receive unit for demodulating receive data from a received RF signal; and
a signal processing unit for detecting a command comprising data signals from the receive data demodulated by the receive
unit and executing processing based on the command, wherein
the signal processing unit has a command acceptance mode for detecting the command from the receive data and a command execution
mode for executing the command, and generates an error signal when the data signal is not detected from the receive data in
the command acceptance mode.
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