NXP Semiconductors
UM10858
PN7462 family HW user manual
UM10858
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.4 — 14 May 2018
314514
170 of 345
Bit
Symbol
Access
Value
Description
1
RX_CRC_INV
D
0, 1
Controls the comparison of the CRC checksum for the
Rx-Decoder
0*
Not inverted CRC value: 0000h, reset value
Note
: That this nit is cleared by the Mode detector for
ISO14443 type A and FeliCa.
1
Inverted CRC value: F0B8h
Note
: That this bit is set by the Mode detector for ISO14443
type B.
0
RX_CRC_ENABLE
D
0*, 1
If set, the Rx-Decoder will check the CRC for correctness.
Note
: That this bit is set by the Mode Detector, when
ISO14443 type B, or FeliCa (212 or 424kBd) is detected.
Table 208. CLIF_CRC_TX_ CONFIG_REG register (address 0070h)
* = reset value
Bit
Symbol
Access
Value
Description
31:16
TX_CRC_PRESET_
VALUE
R/W
0*- FFFFh
Arbitrary preset value for the Tx-Encoder CRC calculation.
15:7
RESERVED
R
0
Reserved
6
TX_CRC_BYTE2_E
NABLE
R/W
0*, 1
If set, the CRC is calculated from the 2nd byte onwards
(intended for HID).
Note: That this option is used in the Tx-Encoder.
5:3
TX_CRC_PRESET_
SEL
R/W
000-101b
Preset value of the CRC register for the Tx-Encoder. For a
CRC calculation using 5bits, only the LSByte is used.
000b*
0000h, reset value
001b
6363h
010b
A671h
011b
FFFFh
100b
0012h
101b
E012h
110b
reserved
111b
Use arbitrary preset value TX_CRC_PRESET_VALUE
2
TX_CRC_TYPE
R/W
0, 1
Controls the type of CRC calculation for the
Tx-Encoder
0*
16-bit CRC calculation, reset value
1
5-bit CRC calculation
1
TX_CRC_INV
R/W
0, 1
Controls the sending of an inverted CRC value by the Tx-
Encoder
0*
Controls the sending of an inverted CRC value by the Tx-
Encoder
1
Inverted CRC checksum
0
TX_CRC_ENABLE
R/W
0*, 1
If set to one, the Tx-Encoder will compute and transmit a
CRC.