NT3H2211W0FHKH Datasheet, PDF (51/77 Pages) NXP Semiconductors – NTAG I2C plus, NFC Forum Type 2 Tag compliant IC with I2C interface

NXP Semiconductors
NT3H2111/NT3H2211
NFC Forum Type 2 Tag compliant IC with I²C interface
10.8 READ
The READ command requires a start page address, and returns the 16 bytes of four
NTAG I²C plus pages. For example, if address (Addr) is 03h then pages 03h, 04h, 05h,
06h are returned. Special conditions apply if the READ command address is near the end
of the accessible memory area. For details on those cases and the command structure
refer to Figure 24 and Table 27.
Table 28 shows the required timing.
NFC device
NTAG ,,ACK''
Cmd
Addr
CRC
368 μs
NTAG ,,NAK''
T_ACK
T_NAK
Data
CRC
1548 μs
NAK
57 μs
NT3H2111/NT3H2211
Product data sheet
COMPANY PUBLIC
Time out
Fig 24. READ command
T_TimeOut
aaa-006988
Table 27.
Name
Cmd
Addr
CRC
Data
NAK
READ command
Code
30h
-
-
-
see Table 17
Description
Length
read four pages
1 byte
start page address
1 byte
CRC according to Ref. 1
2 bytes
Data content of the addressed pages 16 bytes
see Section 10.3
4 bit
Table 28. READ timing
These times exclude the end of communication of the NFC device.
READ
T_ACK/NAK min
n=9^[1]
T_ACK/NAK max
T_TimeOut
T_TimeOut
5 ms
[1] Refer to Section 10.2 “Timing”.
In the initial state of NTAG I²C plus, all memory pages are allowed as Addr parameter to
the READ command:
• Page address from 00h to E9h and pages ECh and EDh for NTAG I²C plus 1k and 2k
• Page address from 00h to FFh (Sector 1)for NTAG I²C plus 2k only
• SRAM buffer address when pass-through mode is enabled
Addressing a start memory page beyond the limits above results in a NAK response from
NTAG I²C plus.
In case a READ command addressing start with a valid memory area but extends over an
invalid memory area, the content of the invalid memory area will be reported as 00h.
All information provided in this document is subject to legal disclaimers.
Rev. 3.0 — 3 February 2016
359930
© NXP Semiconductors N.V. 2016. All rights reserved.
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