HTMS8x01 datasheet(33/57 Pages) NXP

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HTMS1x01_8x01

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 17 October 2014

152933

33 of 57

NXP Semiconductors

HTMS1x01; HTMS8x01

HITAG µ transponder IC

14.2 Error handling

In case an error has been occurred the transponder IC responses with the set error flag

and the three bit code ’111’ (meaning ’unknown error’).

The general response format in case of an error response is shown in Table 19 whereas

commands not supporting error responses are excluded. In case of an unsupported

command there will be no response. The format is embedded into SOF and EOF.

Table 19.

Response format in error case

Error flag

Error code

CRC-16

Description

(16)

No. of bits

1111

Fig 17. HITAG µ transponder IC response - in case of no error

Fig 18. HITAG µ transponder IC response - in error case

001aak260

SOF

Error Flag

''0''

Data

(CRC)

EOF

001aak262

SOF

Error Flag

''1''

Error Code

''111''

(CRC)

EOF

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