P4022 EM Microelectronic, P4022 Datasheet
P4022
Related parts for P4022
P4022 Summary of contents
Page 1
... Schottky diodes are required to rectify the carrier wave. applications coupling to transmit energy to the chip using carrier frequencies greater than 100 MHz. frequency transponders using a P4022 chip, one to three microwave diodes and a printed antenna. An external power storage capacitor can be added to improve reading range. applications patented anti- distances (> ...
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... Storage temperature Electrostatic discharge maximum to MIL-STD-883C method 3015 1) whatever is reached first Stresses above these listed maximum ratings may cause permanent CPX Exposure beyond specified operating conditions may affect malfunction. PRELIMINARY P4022 Symbol Conditions ± ...
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... TFREE SUPPLY I GAP enabled, V TGAP SUPPLY I GAP enabled, V TGAP SUPPLY SWITCHED-OFF state, I TDEAD V = 1.2 V SUPPLY SWITCHED-OFF state, I TDEAD SUPPLY PRELIMINARY P4022 Symbol Min Typ Max Units O -40 + COIL COIL 3 Table 2 by the on-chip shunt regulator. ...
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... F to achieve 1 second unpowered Current SWITCHED-OFF state. (SWTICHED- OFF state 2.8 4.6 8 Table 4 Free-running PRELIMINARY P4022 Free- Bi-direc- Counting running tional ( F) (pF) (pF) 2700 3600 20 670 900 20 170 240 20 ...
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... The Switch-off protocol’s main advantage is that identical transponders can be counted. In the P4022 the ACK signal is implemented as two consecutive gaps with the appropriate timing and received at a specific time after a code has been transmitted. ...
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... ACK signal indicating that the transmission which caused the MUTE has been completed. In the P4022 the MUTE signal is implemented as a single gap received while the transponder is not transmitting. Protocol combinations ...
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... Functional description Block diagram M COIL1 COIL2 D1 VDD DG CG GAP Figure 4: P4022 Block diagram Optimum repeat delay settings Table 9 lists the optimum repeat delay settings for each of the protocols vs. number of transponders in a group. Protocol Free-running Slow-down 0.022 0.58 Switch-off 0.019 ...
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... As the rise and fall times of the GAP can be slow, a Schmitt trigger is used to buffer the GAP input. Power storage capacitor power supply capacitor is included in the layout of the P4022. This is sufficient for 64 kbit/s applications, but required an additional external storage capacitor. PRELIMINARY P4022 ...
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... EM MICROELECTRONIC-MARIN SA LOGIC block Depending on the state of the SI input at power- up, the P4022 either enters a test mode ( its normal operating mode (SI = 0). The SI pin is internally pulled down, so that it can be left open for normal operation. After the power-on reset has disappeared, the chip boots by reading the SEED and CTL ROMs ...
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... The earlier the MUTE is sent, the more time the reader has to recover before the SYNCH and code bits arrive, and the smaller the probability that another in the 2 transponder has started a colliding transmission. PRELIMINARY P4022 in the timing diagram). A low 4 in the timing code ...
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... SYNCH. The SYNCH consists LOW for two bit periods followed by a ONE. The P4022 can be programmed for one of two ACK by the data encoding methods. The first method is a variation on represented by a HIGH in the first half of a bit period, and a ZERO is represented by a LOW in the first half of a bit period ...
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... EM MICROELECTRONIC-MARIN SA ROM programming The P4022 contains three laser fuse ROM blocks that are pre-programmed by the foundry. Blowing a laser fuse writes a ZERO into the ROM bit. CODE ID ROM This ROM contains the 64 bit ID code. Unless otherwise specified, the foundry will automatically program a unique 48 bit ID and 16 bit CRC. In ...
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... Glitch encoding, 1 kbit delay Free-running, 64 kbit/s Glitch encoding, 16 kbit delay Fast, Slow-down, 64 kbit/s, Glitch encoding, 4 kbit delay © 1998 EM Microelectronic-Marin SA, 02/98 Rev. A/196 , CH-1074 Marin, Tel. +41 32 755 51 11, Fax. +41 32 755 54 03 PRELIMINARY P4022 CONTROL External ROM Bits Capacitor 0x00E9 600 pF 0x00D9 600 pF ...