CLRC663 Datasheet, PDF (22/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 20. Selectable transfer speeds
Transfer speed (kbit/s)
Serial SpeedReg
(Hex.)
38.4
AB
57.6
9A
115.2
7A
128
74
230.4
5A
460.8
3A
921.6
1C
1228.8
15
Transfer speed accuracy (%)
0.32
0.25
0.25
0.06
0.25
0.25
1.45
0.32
The selectable transfer speeds as shown are calculated according to the following
formulas:
if BR_T0 = 0: transfer speed = 27.12 MHz / (BR_T1 + 1)
if BR_T0 > 0: transfer speed = 27.12 MHz / (BR_T1 + 33)/2^{(BR_T0  1)}
Remark: Transfer speeds above 1228.8 KBits/s are not supported.
8.4.3.2 Framing
Table 21. UART framing
Bit
Start bit (Sa)
Data bits
Stop bit (So)
Length
1 bit
8 bit
1 bit
Value
0
Data
1
Remark: For data and address bytes the LSB bit has to be sent first. No parity bit is used
during transmission.
Read data: To read out data using the UART interface the flow described below has to be
used. The first send byte defines both the mode itself and the address.The Trigger on pin
IF3 has to be set, otherwise no read of data is possible.
Table 22.
Mode
RX
TX
Byte Order to Read Data
byte 0
address
-
byte 1
-
data 0
CLRC663
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 3 April 2012
171133
© NXP B.V. 2012. All rights reserved.
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