MB89R119B datasheet(12/46 Pages) RAMXEED

12 / 46 page

MB89R119B

DS411-00002-4v0-E

2-2.Data frame

Frames are delimited by a start of frame (SOF) and an end of frame (EOF) and implemented using code

violation. The following figure shows the SOF and EOF signals sent in high data rate mode when an ISO

command is received, and the next following figure shows the same signals when a fast command is

received.

For the low data rate, both ISO command and fast command, the same subcarrier frequency is used,

in this case the number of pulses and the timing shall be multiplied by 4.

The reader/writer shall be ready to receive a frame from the transponder within 300 s after having sent

a frame to the transponder.

56.64

μs

37.76

μs

56.64

μs

56.64

μs

56.64

μs

37.76

μs

423.75 kHz subcarrier



SOF



EOF



Waveforms of SOF and EOF signals of a frame sent from a transponder (ISO commands)

28.32

μs

28.32

μs

28.32

μs

28.32

μs

18.88

μs

18.88

μs

423.75 kHz

Subcarrier

423.75 kHz

Subcarrier



SOF



EOF



Waveforms of SOF and EOF signals of a frame sent from a transponder (fast commands)

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