NT3H2111 Datasheet, PDF (43/77 Pages) NXP Semiconductors – Designed to be the perfect enabler for NFC in home-automation

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9.8 WRITE and READ register operation
In order to modify or read the session register bytes (see Table 14), NTAG I²C plus requires the WRITE and READ register
operation (see Figure 19).
Write:
Host
Start
7 bits SA and ‘0’
MEMA
REGA
MASK
REGDAT
Stop
Tag
A
A
A
A
A
Read:
Host
Start
7 bits SA and ‘0’
MEMA
REGA
Stop
Tag
A
A
A
Fig 19. WRITE and READ register operation
Start 7 bits SA and ‘1’
A Stop
A REGDAT
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