Product data

MFRC631 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 4 February 2014
227433 18 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
Write data:
To write data to the MFRC631 using the UART interface the following sequence has to be
used.
The first send byte defines both, the mode itself and the address.
Remark: Data can be sent before address is received.
Fig 11. Timing Diagram for UART Read Data
001aam298
A0 A1Sa A2 A3
TX
RX
A4 A5 A6 RD/
NWR
So
D0
DATA
ADDRESS
D1Sa D2 D3 D4 D5 D6 D7 So
Table 16. Byte Order to Write Data
Mode byte 0 byte 1
RX address 0 data 0
TX address 0
Fig 12. Timing diagram for UART write data
001aam299
A0 A1Sa A2 A3
TX
RX
A4 A5 A6 RD/
NWR
So
A0
ADDRESS
ADDRESS
A1Sa A2 A3 A4 A5 A6 RD/
NWR
So
D0
DATA
D1Sa D2 D3 D4 D5 D6 D7 So