Technical Manual

East Wind Technologies, Inc.
Copyright © 2022 East Wind Technologies, Inc. All rights reserved. 9/59
1.6 Module function configuration table
EWTJ680H
JCP04 Communication Protocol
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JCP05 Communication Protocol
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MIFARE Classic 1K
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MIFARE Classic 4K
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MIFARE Ultralight
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MIFARE Mini
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MIFARE DESFire
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MIFARE Plus
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T=CL TYPE A
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SR176
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SRI512
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SRI1K
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SRI2K
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SRI4K
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SRIX4K
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T=CL TYPE B
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NTAG213, NTAG216 and so on
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NTAG series
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RS232C Interface
EWTJ680H
1.7 Basic Mode
EWTJ680H is a slave device; the "ask & answer" is the basic working mode. That means
EWTJ680H-I received a command from master machine, and then to execute the command and
answer to master machine. This is a command cycle. A new command will not be accepted while the
module is executing a command. So when you develop the application program, you MUST be sure
the last command cycle is finished, then to send the next command.
1.8 Automatically Detecting Card
EWTJ680H supports automatic detecting cards that are based on ISO14443A. When the
automatic detecting cards function is open, then EWTJ680H-I continuously send searching card
commands. Once the card is entering into the effective electrical field, the ICC pin will show low level.
In this situation, you could directly to do operation to the card. If the automatic detecting function is
close, when you want to do operation to the card, you need send searching card command firstly.
The default automatic detecting cards function could be set via 0x1D command. This setting is saved
in FLASH. The setting will be effect on next power on. While module is working, the automatic
detecting cards function could be temporarily open or closed via 0x11 command. This setting will not