Product Specs

Confidential
SPD RFID Reader 2021-09-23
SPD6873160007R07.docx Page 9 of 20
3. Functional description
This section contains the functional description of the RFID Reader. The interfaces can be found in
Section 4, mechanical specifications in Section 5 and environmental specifications in Section 6.
3.1. Top level block diagram
Figure 3-1 shows the global block diagram of the RFID Reader with a functional level of detail
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showing only main connections.
Figure 3-1: Main block diagram
3.2. Controller
The RFID Reader contains an AMR Cortex 32-bit controller with 64kB flash, part number:
10
STM32F302K8U6.
3.3. RS232
The RFID Reader contains one serial RS232 interface, included in CN_RS232 (§4.1) for
communication with the control system.
• The RS232 interface is non-isolated.
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• The RS232 pins are ESD protected: +/-15kV HBM
• Serial interface characteristics are listed in Table 3-1.
Table 3-1: RS232 performance
Mnemonic
Description
Min.
Typ.
Max.
Unit
Remarks
fDR_RS232
RS232 interface speed
115.2
kbps
3.4. RFID
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The RFID Reader supports contactless communication of RFID tags based on the 13.56 MHz and
the 125 kHz system.
3.4.1. RFID 13.56MHz
The 13.56MHz RFID system is based on Texas Instruments TRF7970ARHBR and supports:
• ISO14443 A/MIFARE
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• ISO14443 B
• ISO15693
• NFCIP-1
• Supported cards: refer to software specification [2.3]
• Write mode is not supported
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• The expected range is listed in Table 3-2
Antenna
RFID Reader
RFID front-end
(125 kHz)
RFID reader
(13.56 MHz)
6V-36V input
+V
RS232
CN_RS232
Power connection
Signal connection
RF connection
Internal peripheral
External interface
Outer product
Supplies
Antenna
CABLE
Serial
Input protection
PCB connector
Controller
(MCU)