mfrc500 NXP Semiconductors, mfrc500 Datasheet - Page 35

• Manufacturer Part Number: mfrc500
• Description: Highly Integrated Iso14443a Reader Ic
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Highly Integrated ISO 14443A Reader IC
5.2.2.8
Adjustments for bit oriented frames.
Name: BitFraming
Description of the bits
6-4
2-0
Bit
Access
Rights
7
3
BitFraming Register
TxLastBits
Symbol
RxAlign
0
0
r/w
7
0
Reserved for future use
Used for reception of bit oriented frames: RxAlign defines the bit position for the
first bit received to be stored in the FIFO. Further received bits are stored in the
following bit positions.
After reception, RxAlign is cleared automatically.
Example:
reserved for future use
Used for transmission of bit oriented frames: TxLastBits defines the number of
bits of the last byte that shall be transmitted. A 000 indicates that all bits of the last
byte shall be transmitted.
After transmission, TxLastBits is cleared automatically.
dy
6
Address: 0x0F
RxAlign
dy
5
RxAlign = 0:
RxAlign = 1:
RxAlign = 7:
dy
35
4
the LSB of the received bit is stored at bit 0,
second received bit is stored at bit position 1
the LSB of the received bit is stored at bit 1,
second received bit is stored at bit position 2
the LSB of the received bit is stored at bit 7,
second received bit is stored in the following byte
at bit position 0
Product Specification Rev. 3.2;December 2005
Function
r/w
3
0
Reset value: 00000000, 0x00
dy
2
TxLastBits
dy
1
MF RC500
PUBLIC
dy
0