User's Manual
Table Of Contents
- 1. Introduction
- The PN7150 architecture overview
- 2. NCI Overview
- 3. DH interface
- 5. Initialization & Operation configuration
- 6. Reader/Writer Mode
- 6.1 T1T, T2T, MIFARE Ultralight, MIFARE Classic and MIFARE Plus tags
- 6.1.1 Access through the [NCI] Frame RF Interface
- 6.1.2 [PN7150-NCI] extension: TAG-CMD Interface
- 6.1.3 [PN7150-NCI] extension: Payload structure of the TAG-CMD RF Interface
- 6.1.4 [PN7150-NCI] extension: REQs & RSPs rules
- 6.1.5 [PN7150-NCI] extension: List of REQs & RSPs
- 6.1.6 [PN7150-NCI] extension: raw data exchange REQs & RSPs
- 6.1.7 [PN7150-NCI] extension: T2T & MFU REQs & RSPs
- 6.1.8 [PN7150-NCI] extension: MIFARE Classic REQs & RSPs
- 6.1.9 Access through the TAG-CMD RF Interface
- 6.2 T3T tag
- 6.3 T4T & ISO-DEP Tags/Cards
- 6.3.1 Access through the Frame RF Interface
- 6.3.2 Access through the ISO-DEP RF Interface
- 6.3.3 [PN7150-NCI] extension: Presence check Command/Response
- 6.3.4 [PN7150-NCI] extension: S-Block Command/Response
- 6.3.5 [PN7150-NCI] extension: WTX notification
- 6.3.6 [PN7150-NCI] extension: Higher bit rates in Poll NFC-A & NFC-B
- 6.4 [PN7150-NCI] extension: 15693 & I-Code tags
- 6.5 [PN7150-NCI] extension: KOVIO tags
- 6.1 T1T, T2T, MIFARE Ultralight, MIFARE Classic and MIFARE Plus tags
- 7. Card Emulation Mode
- 8. P2P Initiator & Target Mode
- 9. RF Discovery Management
- 9.1 RF Discovery functionalities
- 9.2 NFC FORUM Profile as defined in [NCI]
- 9.3 [PN7150-NCI] extension: additional technologies not yet supported by the NFC FORUM
- 9.4 [PN7150-NCI] extension: Low Power Card Detector (LPCD) Mode
- 9.5 [PN7150-NCI] extension: EMVCo Profile in Poll & Listen Modes
- 9.6 [PN7150-NCI] extension: Power optimization
- 10. Configurations
- 11. Test Mode
- 12. PN7150 Practical approach
U
M10936
P
N7150 User Manual
UM
10936 All information provided in this document is subject to legal disclaimers.
U
ser manual
CO
MPANY PUBLIC
Rev. 2.0 — 6 November 2020
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78 of 127
9.
4.2 Configuration of the Technology Detection Activity when the LPCD has
detected an "object"
A
s described in the previous chapter, once the PN7150 detects a change in the antenna
impedance, it performs a Technology Detection as defined in [ACTIVITY] which tries to
activate the “object” by sending Request Commands from the different technologies
configured for the RF Discovery.
In order to improve the likelihood to catch such a Card/Tag, the PN7150 comes with a retry
mechanism which performs several Technology Detection polling cycles before it switches
back to LPCD.
During this retry mechanism, a temporary period is used, called TechDet_PERIOD. This
is specified in steps of 10ms. The number of the retry cycles can also be configured thanks
to the TechDet_NBR_RETRIES parameter.
Table 75. Parameters used to configure the overall period of the RF Discovery:
LPCD Status Period between 2 consecutive
T
echnology Detections
Period between 2 consecutive
L
PCD RF pulses
E
nabled TechDet_PERIOD TOTAL_DURATION
Disabled TOTAL_DURATION Not applicable
T
he next figure illustrates how these 3 parameters TOTAL_DURATION,
TechDet_PERIOD and TechDet_NBR_RETRIES influence the Low Power Card Detector
and the RF Discovery:
TOTAL_DURATION
No Response
Technology
Detection
LPCD RF
pulse
TechDet_
PERIOD
Technology
Detection
LPCD RF
pulse
LPCD:
an « object »
detected
No Detection No Detection
TechDet_RETRIES
No
Rsp
No
Rsp
No
Rsp
No
Rsp
LPCD RF
pulse
LPCD RF
pulse
No Detection
TOTAL_DURATION TOTAL_DURATION TOTAL_DURATION
TechDet_
PERIOD
TechDet_
PERIOD
TechDet_
PERIOD
F
ig 40. Illustration of the Low Power Card detector and the subsequent Technology Detection cycles
Se
e →10.2.1 for the description of the configuration parameter
TechDet_AFTER_LPCD_CFG containing the 2 parameters TechDet_PERIOD and
TechDet_NBR_RETRIES.