MFRC52201HN1/TRAYB NXP [NXP Semiconductors], MFRC52201HN1/TRAYB Datasheet - Page 44

• Manufacturer Part Number: MFRC52201HN1/TRAYB
• Description: Contactless reader IC
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
MFRC522_33
Product data sheet
PUBLIC
9.3.1.14 BitFramingReg register
9.3.1.15 CollReg register
Adjustments for bit-oriented frames.
Table 47.
Table 48.
Defines the first bit-collision detected on the RF interface.
Table 49.
Table 50.
Bit
Symbol
Access
Bit
7
6 to 4
3
2 to 0
Bit
Symbol
Access
Bit
7
6
5
Symbol
ValuesAfterColl
reserved
CollPosNotValid
StartSend
Symbol
StartSend
RxAlign[2:0]
reserved
TxLastBits[2:0]
ValuesAfterColl reserved
BitFramingReg register (address 0Dh); reset value: 00h bit allocation
BitFramingReg register bit descriptions
CollReg register (address 0Eh); reset value: xxh bit allocation
CollReg register bit descriptions
W
7
R/W
7
Rev. 3 — 26 October 2009
6
Value Description
1
0
1
7
-
-
RxAlign[2:0]
6
-
112133
starts the transmission of data
only valid in combination with the Transceive command
used for reception of bit-oriented frames: defines the bit
position for the first bit received to be stored in the FIFO buffer
example:
These bits are only to be used for bitwise anticollision at
106 kBd, for all other modes they are set to 0
reserved for future use
used for transmission of bit oriented frames: defines the
number of bits of the last byte that will be transmitted
000b indicates that all bits of the last byte will be transmitted
-
1
Value Description
0
R/W
5
LSB of the received bit is stored at bit position 0, the second
received bit is stored at bit position 1
LSB of the received bit is stored at bit position 1, the second
received bit is stored at bit position 2
LSB of the received bit is stored at bit position 7, the second
received bit is stored in the next byte that follows at bit
position 0
CollPosNotValid
all received bits will be cleared after a collision
only used during bitwise anticollision at 106 kBd,
otherwise it is set to logic 1
reserved for future use
no collision detected or the position of the collision is
out of the range of CollPos[4:0]
R
5
4
reserved
3
-
4
3
2
CollPos[4:0]
Contactless reader IC
TxLastBits[2:0]
MFRC522
R
2
© NXP B.V. 2009. All rights reserved.
R/W
1
1
44 of 96
0
0