Datasheet

PN512 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 5.2 — 16 June 2016
111352 72 of 137
NXP Semiconductors
PN512
Full NFC Forum-compliant frontend
[1] The resulting transfer speed error is less than 1.5 % for all described transfer speeds.
The selectable transfer speeds shown in Table 11 are calculated according to the
following equations:
If BR_T0[2:0] = 0:
(1)
If BR_T0[2:0] > 0:
(2)
Remark: Transfer speeds above 1228.8 kBd are not supported.
9.3.3 UART framing
Table 146. BR_T0 and BR_T1 settings
BR_Tn Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7
BR_T0 factor11248163264
BR_T1 range 1 to 32 33 to 64 33 to 64 33 to 64 33 to 64 33 to 64 33 to 64 33 to 64
Table 147. Selectable UART transfer speeds
Transfer speed (kBd) SerialSpeedReg value Transfer speed accuracy (%)
[1]
Decimal Hexadecimal
7.2 250 FAh 0.25
9.6 235 EBh 0.32
14.4 218 DAh 0.25
19.2 203 CBh 0.32
38.4 171 ABh 0.32
57.6 154 9Ah 0.25
115.2 122 7Ah 0.25
128 116 74h 0.06
230.4 90 5Ah 0.25
460.8 58 3Ah 0.25
921.6 28 1Ch 1.45
1228.8 21 15h 0.32
transfer speed
27.12 10
6

BR_T0 1+
--------------------------------
=
transfer speed
27.12 10
6

BR_T1 33+
2
BR_T0 1–
-----------------------------------
-----------------------------------





=
Table 148. UART framing
Bit Length Value
Start 1-bit 0
Data 8 bits data
Stop 1-bit 1