CLRC632 Datasheet, PDF (37/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
5.2.2.8 BitFraming Register
Adjustments for bit oriented frames.
Name: BitFraming
Address: 0x0F
Product Specification Rev. 3.0; May 2003
CL RC632
Reset value: 00000000, 0x00
7
6
5
4
3
2
1
0
0
RxAlign
0
TxLastBits
Access
r/w
dy
dy
dy
r/w
dy
dy
dy
Rights
Description of the bits
Bit
Symbol
7
0
6-4
RxAlign
3
0
2-0
TxLastBits
Function
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:
RxAlign = 0: the LSB of the received bit is stored at bit 0,
second received bit is stored at bit position 1
RxAlign = 1: the LSB of the received bit is stored at bit 1,
second received bit is stored at bit position 2
RxAlign = 7:
the LSB of the received bit is stored at bit 7,
second received bit is stored in the following byte
at bit position 0
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.
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