HTMS1x01_8x01 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.4 — 21 May 2015
152934 35 of 57
NXP Semiconductors
HTMS1x01; HTMS8x01
HITAG µ transponder IC
14.4 INVENTORY ISO 11785
[Advanced, Advanced+]
Upon reception of this command without error, all transponder ICs in the ready state are
performing the anticollision sequence. The inventory (INV) flag is set to '1'. The NOS flag
determines whether 1 or 16 slots are used.
In contrast to INVENTORY command the transponder IC (holding requested slot) sends
the 64-bit ISO 11785 number in addition to remaining UID. The 64-bit number is taken
from a fixed area of EEPROM. It will not be checked on ISO 11785 compliance before
sending.
If a transponder IC detects any error, it remains silent.
[1] Error, CRC and ISO 11785 number are Manchester coded, UID is dual pattern coded
14.5 STAY QUIET
[Advanced, Advanced+]
Upon reception of this command without error, a transponder IC in either ready state or
selected state enters the quiet state and shall not send back a response.
The STAY QUIET command with both SEL and ADR flag set to '0' or both set to '1' is not
allowed.
There is no response to the STAY QUIET request, even if the transponder detects an error
Table 23. INVENTORY ISO 11785 - request format (23h)
Flags Command Mask length Mask value CRC-16 Description
5 6 6 n (16) No. of bits
10(1)10 100011 0 n UID length UID Mask
AC with 1
timeslot
00(1)10 100011 0 n UID length UID Mask
AC with 16
timeslot
Table 24. Response to a successful INVENTORY ISO 11785 request
[1]
Error Flag Data 1 Data 2 CRC-16 Description
1 48 - n 64 (16) No. of bits
0 Remaining UID without mask value ISO 11785 number
Table 25. STAY QUIET - request format(01h)
Flags Command Data CRC-16 Description
5 6 (48) (16) No. of bits:
00(1)00 000001 - without UID
11(1)00 000001 UID with UID
