ACS ACR122L, User Manual

Page: 2 / 57

ACR122L – Communication Protocol
info@acs.com.hk
Version 1.03
www.acs.com.hk
Page 2 of 57
Table of Contents
1.0. Introduction ............................................................................................................... 4
2.0. Features ..................................................................................................................... 5
2.1. Serial Interface ....................................................................................................................... 5
2.2. LCD ........................................................................................................................................ 5
2.3. LEDs ...................................................................................................................................... 6
2.4. Buzzer .................................................................................................................................... 6
2.5. SAM Interface ........................................................................................................................ 6
2.6. Built-in Antenna ..................................................................................................................... 6
3.0. Communication between the host and contactless interface, SAM and
peripherals ............................................................................................................................. 7
4.0. Serial Interface (CCID-like Frame Format) .............................................................. 8
4.1. Protocol Flow Examples ........................................................................................................ 9
5.0. SAM Interface .......................................................................................................... 11
5.1. Activating the SAM Interface ............................................................................................... 11
5.2. Deactivating the SAM Interface ........................................................................................... 12
5.3. Exchanging data through the SAM Interface ....................................................................... 14
6.0. Pseudo-APDUs for contactless interface and peripherals control .................... 17
6.1. Direct Transmit .................................................................................................................... 17
6.2. Change Communication Speed ........................................................................................... 20
6.3. Get firmware version ............................................................................................................ 24
6.4. LCD Display (ASCII Mode) .................................................................................................. 25
6.5. LCD Display (GB Mode) ...................................................................................................... 28
6.6. LCD Display (Graphic Mode) ............................................................................................... 29
6.7. Scroll Current LCD Display .................................................................................................. 30
6.8. Pause LCD Scrolling ............................................................................................................ 31
6.9. Stop LCD Scrolling .............................................................................................................. 32
6.10. Clear LCD ............................................................................................................................ 32
6.11. LCD Backlight Control ......................................................................................................... 32
6.12. LCD Contrast Control .......................................................................................................... 33
6.13. LED Enable/Disable ............................................................................................................. 34
6.14. LED Control ......................................................................................................................... 34
6.15. LED and Buzzer Control ...................................................................................................... 35
6.16. Buzzer Control ..................................................................................................................... 41
6.17. Basic program flow for ISO 14443-4 Type A and B tags ..................................................... 41
6.18. Basic program flow for Mifare applications .......................................................................... 43
6.18.1. Handling the value blocks of Mifare 1K/4K tag ........................................................... 45
6.18.2. Accessing Mifare Ultralight tags .................................................................................. 47
6.18.3. Accessing Mifare Ultralight C tags .............................................................................. 49
6.19. Basic program flow for FeliCa applications ......................................................................... 53
6.20. Basic program flow for NFC Forum Type 1 tag applications ............................................... 54
Appendix A. ACR122 Error Codes .................................................................................. 56
List of Figures
Figure 1 : Communication Flowchart of ACR122L ................................................................................. 7
Figure 2 : Character Set A .................................................................................................................... 26
Figure 3
: Character Set B .................................................................................................................... 27
Figure 4 : Character Set C ................................................................................................................... 27
Figure 5 : LCD Display Position ........................................................................................................... 29