DE-631 User Manual
Version : 1.10 DUALi Inc.
(http://www.duali.com)
8
2.3
Description of main Module
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CPU: 32bit RISC ARM core CPU, It is stm32f103 which is ARM-based 32-bit MCU
with Flash, USB. This CPU has 512Kbyte Flash memory, 64Kbyte SRAM.
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NXP PN512 RF IC: This RF IC can control RF card like MIFARE card, type A/B card,
ISO 18092 NFC & FeliCa simultaneously.
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RS-232 Driver: It’s a Communication part for RS-232 communication.
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USB Connector: It’s a Communication part for USB communication.
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RS-485 Driver: It’s a Communication part for RS-485 communication.
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SAM part: It can control 4 SAMs. And each slot can be operated independently.
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LED: It has 4 LEDs to display status of communication and card process.
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LCD : DE-631 has 128*64 graphic LCD Module
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Battery: It maintains RTC and battery backup SRAM while power is not supplied.
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Tamper switch: Erase security memory when case is opened.
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Nor Flash: optional flash memory for non-volatile data.
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PSRAM: optional SRAM for user memory.
