ATA5570C datasheet(4/32 Pages) ATMEL

4 / 32 page

9191B–RFID–05/11

Atmel ATA5570C

Figure 3-2.

Block 0 Configuration Mapping – Atmel® e5550 Compatibility Mode

3.10

Modulator

The modulator consists of data encoders for the following basic types of modulation:

Note 1), 2)

Bit Rate

RF/2

RF/4

RF/8

RFU

RF/8

RF/16

RF/32

RF/50

RF/128

RF/100

RF/64

Direct

PSK3

PSK2

PSK1

RF/40

2) If Master Key < > 6 or 9 then extended function mode is disabled

1) If Master Key = 6 then test mode write commands are ignored

Locked

Unlocked

Master Key

Modulation

Data

PSK

Block

Max

10 11 12

17 18 19 20

13 14 15 16

FSK1a

FSK2a

Reserved

Bi-phase ('50)

Manchester

FSK2

FSK1

Table 3-1.

Types of Atmel e5550-compatible Modulation Modes

Mode

Direct Data Output

Encoding

FSK1a(1)

FSK/8, FSK/5

“0” = RF/8;

“1” = RF/5

FSK2a(1)

FSK/8, FSK/10

“0” = RF/8;

“1” = RF/10

FSK1(1)

FSK/5, FSK/8

“0” = RF/5;

“1” = RF/8

FSK2(1)

FSK/10, FSK/8

“0” = RF/10;

“1” = RF/8

PSK1(2)

Phase change when input changes

PSK2(2)

Phase change on bit clock if input high

PSK3(2)

Phase change on rising edge of input

Manchester

“0” = falling edge, “1” = rising edge

Bi-phase

“1” creates an additional mid-bit change

NRZ

“1” = damping on, “0” = damping off

Notes:

1. A common multiple of bit rate and FSK frequencies is recommended.

2. In PSK mode the selected data rate has to be an integer multiple of the PSK sub-carrier

frequency.

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