AT88SC0808CRF-WA1 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT88SC0808CRF-WA1

CryptoRF® Specification

Atmel Corporation 

AT88SC0808/1616/3216/6416CRF, AT88RF04C

P.2.

Reader Requirements

Table 113. ISO/IEC 14443 Reader Requirements [Not PICC Antenna Size Dependent](1)

Symbol

Parameter

Min Nominal Max

Units ISO/IEC Spec.

fc

Carrier Frequency

13.553 13.560 13.567 MHz

14443-2 6.1

M.I.

Field Modulation Index (PCD to PICC communication)

8

11

14 percent 14443-2 9.1.2

M.D.

Field Modulation Depth (PCD to PICC communication) 85.2

80.2

75.4 percent

ETU

Elementary Time Unit = Bit Time ( fc /128)

9.4346 9.4395 9.4444 μS

14443-2 9.1.1

EGT

Extra Guard Time (PCD to PICC communication)

0

57 μS

14443-3 7.1.2

TR2

Frame Delay Time

(PICC EOF falling edge to PCD SOF falling edge)

14

ETU

14443-3 7.1.7

Note: 1. Nominal values at 25° C.

The CryptoRF family has been designed to operate with an ISO/IEC 14443 Type B compliant PCDs meeting the

requirements listed in Table 113. CryptoRF has been characterized using PICCs with ID-1 size antennas and ISO/IEC

14443 Type B compliant readers with appropriately sized PCD antennas. The PCD characteristics in Table 113 are not

PICC antenna size dependent.

P.3. PICC Antenna Size Dependent Specifications

Table 114. Antenna Size Dependent Characteristics [ID-1 PICC Antennas Only](1)

Symbol

Parameter

Min Nominal Max

Units ISO/IEC Spec.

H

Unmodulated Operating Magnetic Field

1.5

7.5 A/m rms 14443-2 6.2

Maximum Magnetic Field Exposure (Non-Operating)

10

A/m rms 14443-1 4.3.5

Load Modulation Amplitude at Hmin (1.5 A/m rms)

Load Modulation Amplitude at Hmin (7.5 A/m rms)

18.45

2.68

mV peak 14443-2 9.2.2

(test per 10373-6)

mV peak

Note: 1. Nominal values at 25° C. Values are based on characterization and are not tested.

The specifications in Table 114 apply to ISO/IEC 14443 PICCs using an ID-1 size antenna only. CryptoRF has been

characterized using ID-1 antennas and operates within these limits.

The magnetic field limits of ISO/IEC 14443 are measured using a calibration coil defined in ISO/IEC 10373-6 section

6.1. This calibration coil integrates the field strength over the 3000 mm2 area of a typical ID-1 antenna. The Hmin and

Hmax limits of 1.5 and 7.5 A/m rms define the expected operating volume of a PCD with an ID-1 size PICC. The PCD

is not allowed to generate a magnetic field strength exceeding 7.5 A/m rms. An ID-1 PICC is required to survive

continuous exposure to a 10 A/m rms magnetic field without damage; this non-operating specification guarantees a

robust PICC RF interface circuit.

The Load Modulation Amplitude is measured over the full operating magnetic field strength range using an apparatus

defined in ISO/IEC 10373-6 section 7.1. This apparatus uses sense coils to detect the signal generated by a PICC

transmitting a message to the PCD. The sense coils are optimized to detect a signal generated by an ID-1 PICC. The

ISO/IEC 14443 Load Modulation Amplitude requirements apply to this test apparatus only.

5276C–RFID–3/09

141

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