MFRC522 Datasheet, PDF (62/109 Pages) NXP Semiconductors – Contactless Reader IC

NXP Semiconductors
MFRC522
Contactless Reader IC
Table 146: Settings for TX2
TX1RFEn Force TX2CW
100ASK
0
x
x
1
0
0
1
1
0
1
InVTx2
RFON
x
0
1
0
1
0
1
0
1
InVTx2
RFOFF
x
Envelope
x
x
0
1
X
0
1
x
X
x
X
x
0
1
x
0
1
x
X
x
X
TX2
x
RF
RF
RF_n
RF_n
RF
RF_n
0
RF
0
RF_n
RF
RF_n
GSPMos GSNMos Remarks
x
pMod
pCW
pMod
pCW
pCW
pCW
pMod
pCW
pMod
pCW
pCW
pCW
x
nMod
nCW
nMod
nCW
nCW
nCW
nMod
nCW
nMod
nCW
nCW
nCW
not specified if RF
is switched off
Gs always CW for
TX2CW
100%ASK:Tx2
pulled to 0
(independent of
InvTx2RFOn/INVT
X2RFOff)
The following abbreviations are used:
• RF: 13.56 MHz clock derived from 27.12 MHz quartz divided by 2
• RF_n: inverted 13.56 MHz clock
• gspmos: Conductance, configuration of the PMOS array
• gspmos: Conductance, configuration of the NMOS array
• pCW: PMOS conductance value for continuos wave defined by CWGsP register
• pMod: PMOS conductance value for modulation defined by ModGsP register
• nCW: NMOS conductance value for continuos wave defined by CWGsN register
• nMod: NMOS conductance value for modulation defined by ModGsN register
Remark: If only 1 driver is switched on, the values for ModGsN, ModGsP and CWGsN,
CWGsP are used for both drivers.
112132
Product data sheet
Rev. 3.2 — 22 May 2007
© NXP B.V. 2007. All rights reserved.
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