ACS ACR122U User Manual

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Application Programming Interface V2.04

ACR122U

USB NFC Reader

Table of Contents2
Introduction4
Features4
USB Interface5
Table 1: USB Interface5
Implementation6
Communication Flow Chart of ACR122U6
Figure 1: Communication Flow Chart of ACR122U6
Smart Card Reader Interface Overview7
Figure 2: Smart Card Reader Interface on the Device Manager7
PICC Interface Description8
ATR Generation8
ATR Format for ISO 14443 Part 3 Piccs8
Table 2: ATR Format for ISO 14443 Part 3 Piccs8
ATR Format for ISO 14443 Part 4 Piccs9
Table 3: ATR Format for ISO 14443 Part 4 Piccs9
PICC Commands for General Purposes11
Get Data11
PICC Commands (T=CL Emulation) for MIFARE Classic Memory Cards12
Load Authentication Keys12
Authentication13
Table 4: MIFARE 1K Memory Map14
Table 5: MIFARE Classic 4K Memory Map14
Table 6: MIFARE Ultralight Memory Map15
Read Binary Blocks16
Update Binary Blocks17
Value Block Related Commands18
Value Block Operation18
Read Value Block19
Restore Value Block20
Pseudo-APDU Commands21
Direct Transmit21
Bi-Color LED and Buzzer Control22
Get Firmware Version of the Reader24
Get the PICC Operating Parameter25
Set the PICC Operating Parameter26
Set Timeout Parameter27
Set Buzzer Output During Card Detection28
Basic Program Flow for Contactless Applications29
Figure 3: Basic Program Flow for Contactless Applications29
How to Access PC/SC-Compliant Tags (ISO 14443-4)31
How to Access MIFARE Desfire Tags (ISO 14443-4)32
How to Access Felica Tags (ISO 18092)34
How to Access NFC Forum Type 1 Tags (ISO 18092)35
Figure 4: Topaz Memory Map36
Get the Current Setting of the Contactless Interface37
Appendix A. ACR122U PC/SC Escape Command38
Appendix B. APDU Command and Response Flow for ISO 14443-Compliant Tags41
Appendix C. APDU Command and Response Flow for ISO 18092-Compliant Tags42
Appendix D. Error Codes43
Table 7: Error Codes44
Appendix E. Sample Codes for Setting the LED45

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Technical Specifications7 pages

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ACS ACR122U Specifications

General

Brand	ACS
Model	ACR122U
Category	Card Reader
Language	English

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