SR176_07 datasheet(10/35 Pages) STMICROELECTRONICS

Part #	SR176

Description	13.56 MHz, 176-bit short range contactless user EEPROM with 64-bit Unique ID

PDF	35 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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10 / 35 page

Data transfer

SR176

10/35

3.6

Character transmission format for answer frames

The character format is the same as for the input data transfer (Figure 4). The transmitted

frames include an SOF, data, a CRC and an EOF (as shown in Figure 10). Like the input

data transfer, in case of error, the reader does not emit any error code to the SR176, but

must be able to detect and manage this situation. The data transfer rate is 106 Kbit/second.

3.7

Answer start of frame

The SOF, as shown in Figure 8, consists of:

●

10 ETUs at logic 0

●

2 ETUs at logic 1

3.8

Answer end of frame

The EOF, as shown in Figure 9, consists of:

●

10 ETUs at logic 0

●

2 ETUs at logic 1

Figure 7.

Emitted wave using BPSK subcarrier modulation

Figure 8.

Answer start of frame

Figure 9.

Answer end of frame

Data Bit to Transmit

to the Reader

AI09059

847.5kHz BPSK Modulation

Generated by the SR176

BPSK Modulation at 847.5kHz

During One Bit Time (1/106kHz)

ai07665

ETU

b10

b11

0000000000

ai07665

ETU

b10

b11

0000000000

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