參數資料
型號: MFRC53001T
廠商: NXP Semiconductors N.V.
元件分類: 通信及網絡
英文描述: ISO-IEC 14443 A Reader IC
封裝: MFRC53001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 5, 2005,;MFRC53001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1
文件頁數: 61/115頁
文件大?。?/td> 2590K
代理商: MFRC53001T
MFRC530_33
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NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.3 — 6 July 2010
057433
61 of 115
NXP Semiconductors
MFRC530
ISO/IEC 14443 A Reader IC
10.5.4.5
RxThreshold register
Selects thresholds for the bit decoder.
Table 89.
Bit
Symbol
Access
Table 90.
Bit
7 to 4
10.5.4.6
BPSKDemControl
Controls BPSK demodulation.
Table 91.
Table 92.
Bit
7 to 5
4
3 to 2
RxThreshold register (address: 1Ch) reset value: 1111 1111b, FFh bit allocation
7
6
5
4
MinLevel[3:0]
R/W
3
2
1
0
CollLevel[3:0]
R/W
RxThreshold register bit descriptions
Symbol
Description
MinLevel[3:0]
the minimum signal strength the decoder will accept. If the signal
strength is below this level, it is not evaluated.
CollLevel[3:0]
the minimum signal strength the decoder input that must be reached
by the weaker half-bit of the Manchester encoded signal to generate
a bit-collision (relative to the amplitude of the stronger half-bit)
3 to 0
BPSKDemControl register (address: 1Dh) reset value: 0001 1110b, 1Eh bit
allocation
7
6
5
000
FilterAmpDet
Bit
Symbol
4
3
TauD[1:0]
2
1
TauB[1:0]
0
Access
R/W
R/W
R/W
R/W
BPSKDemControl register bit descriptions
Symbol
Value
Description
000
0
these values must not be changed
FilterAmpDet -
switches on a high-pass filter for amplitude detection
TauD[1:0]
-
changes the time constant of the internal PLL whilst receiving
data
TauB[1:0]
-
changes the time constant of the internal PLL during data bursts
1 to 0
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