MB89R119B datasheet(10/46 Pages) RAMXEED

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MB89R119B

DS411-00002-4v0-E

1-2. Data rate and data coding

The MB89R119B supports only 1 out of 4 mode for data coding, not 1 out of 256 mode.

In 1 out of 4 mode, 2-bit signals are coded in a period of 75.52 s as shown in the following. The resulting

data rate is 26.48 kbps(fc/512). Each signal is transmitted beginning with the least bit.

1-3. Data frame

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

using code violation.The MB89R119B shall be ready to receive a frame from a reader/writer within

300 s after the MB89R119B has sent a frame to the reader/writer. The MB89R119B shall be ready to

receive a frame from a reader/writer within 1 ms of activation by the powering field.

9.44

μs

9.44

μs

9.44

μs

9.44

μs

9.44

μs

75.52

μs

75.52

μs

75.52

μs

75.52

μs

28.32

μs

47.20

μs

66.08

μs



“00B” pulse position



“01B” pulse position (1  LSB)



“10B” pulse position (0  LSB)



“11B” pulse position



Coding Method in 1 out of 4 Mode

SOF

9.44

μs

9.44

μs

9.44

μs

37.76

μs

37.76

μs

37.76

μs

9.44

μs

9.44

μs

EOF



Waveforms of SOF and EOF signals of a frame sent from a reader/writer

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