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 17 of 37
NXP Semiconductors
SL3S1203_1213
UCODE G2iL and G2iL+
The features can only be activated/deactivated using standard EPC WRITE if the EPC
bank is unlocked. The permanent and temporary bits of the Configuration Word can be
toggled without the need for an ACCESS password in case the ACCESS password is set
to zero. In case the EPC bank is locked the lock needs to be removed before applying
changes or the ChangeConfig command has to be used.
10.7.2 G2iL, G2iL+ special features control mechanism
Special features of the G2iL are managed using a configuration word (Config-Word)
located at address 200h in the EPC memory bank.
The entire Config-Word is selectable (using the standard EPC SELECT
2
command) and
can be read using standard EPC READ command and modified using the standard EPC
WRITE or ChangeConfig custom command in case the EPC memory is locked for writing.
ChangeConfig can be executed from the OPEN and SECURED state.
The chip will take all “Toggle Bits” for ’0’ if the chip is in the OPEN state or the ACCESS
password is zero; therefore it will not alter any status bits, but report the current status
only. The command will be ignored with an invalid CRC-16 or an invalid handle. The chip
will then remain in the current state. The CRC-16 is calculated from the first
command-code bit to the last handle bit.
A ChangeConfig command without frame-sync and proceeding Req_RN will be ignored.
The command will also be ignored if any of the RFU bits are toggled.
In order to change the configuration, to activate/deactivate a feature a ’1’ has to be written
to the corresponding register flag to toggle the status. E.g. sending 0x0002 to the register
will activate the read protection of the TID. Sending the same command a second time will
again clear the read protection of the TID. Invalid toggling on indicator or RFU bits are
ignored.
Executing the command with zero as payload or in the OPEN state will return the current
register settings. The chip will reply to a successful ChangeConfig with an extended
preamble regardless of the TRext value of the Query command.
After sending a ChangeConfig an interrogator shall transmit CW for less than T
Reply
or
20 ms, where T
Reply
is the time between the interrogator's ChangeConfig command and
the chip’s backscattered reply. An interrogator may observe three possible responses
after sending a ChangeConfig, depending on the success or failure of the operation
• ChangeConfigChangeConfig succeeded: The chip will backscatter the reply shown
above comprising a header (a 0-bit), the current Status Word setting, the handle, and
a CRC-16 calculated over the 0-bit, the status word and the handle. If the interrogator
observes this reply within 20 ms then the ChangeConfig completed successfully.
• The chip encounters an error: The chip will backscatter an error code during the CW
period rather than the reply shown below (see EPCglobal Spec for error-code
definitions and for the reply format).
• ChangeConfig does not succeed: If the interrogator does not observe a reply within
20 ms then the ChangeStatus did not complete successfully. The interrogator may
issue a Req_RN command (containing the handle) to verify that the chip is still in the
interrogator's field, and may reissue the ChangeConfig command.
The G2iL configuration word is located at address 200h of the EPC memory and is
structured as following:
