SL3S1203_1213 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 4.4 — 17 March 2014
178844 22 of 37
NXP Semiconductors
SL3S1203_1213
UCODE G2iL and G2iL+
• ChangeEAS does not succeed: If the interrogator does not observe a reply within
20 ms then the ChangeEAS did not complete successfully. The interrogator may
issue a Req_RN command (containing the handle) to verify that the G2iL is still in the
interrogator's field, and may reissue the ChangeEAS command.
Upon receiving a valid ChangeEAS command a G2iL will perform the commanded
set/reset operation of the PSF bit of the Configuration Word.
If PSF bit is set, the EAS_Alarm command will be available after the next power up and
reply the 64 bit EAS code upon execution. Otherwise the EAS_Alarm command will be
ignored.
10.7.6 EAS_Alarm
Upon receiving an EAS_Alarm custom command the UCODE G2iL will immediately
backscatter an EAS-Alarmcode in case the PSF bit of the Configuration Word is set. The
alarm code is returned without any delay caused by Select, Query and without the need
for a backend database.
The EAS feature of the G2iL is available after enabling it by sending a ChangeEAS
command described in Section 10.7.5 “
ChangeEAS
3
” or after setting the PSF bit of the
Configuration Word to ’1’. With the EAS-Alarm enabled the G2iL will reply to an
EAS_Alarm command by backscattering a fixed 64 bit alarm code. A G2iL will reply to an
EAS_Alarm command from the ready state only. As an alternative to the fast EAS_Alarm
command a standard SELECT
2
(upon the Configuration Word) and QUERY can be used.
If the PSF bit is reset to '0' by sending a ChangeEAS command in the password protected
Secure state or clearing the PSF bit the G2iL will not reply to an EAS_Alarm command.
Table 20. ChangeEAS command
Command ChangeEAS RN CRC-16
# of bits 16 1 16 16
description 11100000
00000011
1 ... set PSF bit
0 ... reset PSF bit
handle
Table 21. G2iL reply to a successful ChangeEAS command
Header RN CRC-16
# of bits 1 16 16
description 0 handle -
Table 22. ChangeEAS command-response table
Starting State Condition Response Next state
ready all – ready
arbitrate, reply,
acknowledged
all – arbitrate
open all – open
secured valid handle backscatter handle,
when done
secured
invalid handle – secured
killed all – killed