NXP Semiconductors PN544 C2 - Page 22

NXP Semiconductors
UM191812
PN544 C2 User Manual
191812 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
User Manual Rev. 1.2 — 2010-06-16 22 of 172
Byte coding of optional HSU baud rate:
0x00 9 600 baud
0x01 RFU
0x02 28 800 baud
0x03 RFU
0x04 RFU
0x05 115 200 baud
0x06 230 400 baud
0x07 460 800 baud
0x08 RFU
A baud rate change is always initiated by the host. The flow is as follows:
Host
PN544
(LLC)
RSET(Window size, Endpoint capabilities,
baudrate)
UA
Change
baud rate (*)
Next I-Frame
ACK
Change
baud rate
(4) (*) A 150μs delay is needed before sending the next I-Frame.
Fig 13. baud rate change flow