NTAG213F/216F
NXP Semiconductors
10.2 READ
NFC Forum T2T IC with 144/888 bytes user memory and field detection
The READ command requires a start page address, and returns the 16 bytes of four
NTAG21xF 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. The special conditions also apply if at least part of the
addressed pages is within a password protected area. For details on those special
condition see the end of the paragraph and the roll over mechanism.
The command structure is shown in Figure 15 and Table 27.
Table 28 shows the required timing.
NFC device
Cmd
Addr
CRC
Data
CRC
NTAG ,,ACK''
T
T
ACK
NAK
368 µs
1548 µs
NAK
NTAG ,,NAK''
57 µs
T
TimeOut
Time out
aaa-006988
Fig 15. READ command
Table 27. READ command
Name
Cmd
Addr
CRC
Data
NAK
Code
Description
Length
1 byte
30h
read four pages
-
start page address
CRC according to Ref. 1
1 byte
-
2 bytes
-
Data content of the addressed pages 16 bytes
see Table 21
see Section 9.3
4-bit
Table 28. READ timing
These times exclude the end of communication of the NFC device.
TACK/NAK min
TACK/NAK max
TTimeOut
READ
n=9[1]
TTimeOut
5 ms
[1] Refer to Section 9.2 “Timings”.
In the initial state of NTAG21xF, all memory pages are allowed as Addr parameter to the
READ command.
• page address 00h to 2Ch for NTAG213F
• page address 00h to E6h for NTAG216F
Addressing a memory page beyond the limits above results in a NAK response from
NTAG21xF.
NTAG213F_216F
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© NXP B.V. 2013. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.1 — 28 August 2013
262231
37 of 56
NXP [ NXP ]
