HTMS8201FTK datasheet(42/57 Pages) NXP

42 / 57 page

HTMS1x01_8x01

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 17 October 2014

152933

42 of 57

NXP Semiconductors

HTMS1x01; HTMS8x01

HITAG µ transponder IC

14.11 WRITE ISO 11785 (custom command)

[

, Advanced, Advanced+]

Upon reception of this command without error, the transponder IC (in Ready state) writes

128-bit of ISO 11785 TTF data into suitable reserved memory block and report the

success of the operation in the response. The user does not have to attend whether the

data is compliant to ISO 11785 or not. The command data block is sent exactly the same

way as it is sent by the transponder IC in TTF mode (Header, 64-bit ID, CRC…) after

entering the field again.

There are two different command codes one for locking the TTF area after successful

write command and one without locking.

The command must be completed by a reset of the IC. After entering the RF field the

ISO 11785 data is sent when the transponder is in ISO 11785 state.

Error Flag set to ’0’ indicates no error.

The minimum value of TFp1 is 20 ms.

Table 40.

WRITE ISO 11785 - request format (38h, 39h)

Flags

Command

Data 1

CRC-16

Description

128

(16)

No. of bits

00(1)00

111000

ISO 11785 TTF data

00(1)00

111001

ISO 11785 TTF data

inc. LOCK

Table 41.

Response to a successful WRITE ISO 11785 request

Error flag

CRC-16

Description

(16)

No. of bits

Fig 19. Waiting time before a response for WRITE ISO 11785 command

001aaj833

carrier on

request

response

request (or EOF)

carrier off

load off

load on

HITAG

transceiver

TNRT

TFp1

TFp2

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