mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 60

• Manufacturer Part Number: mfrc531
• Description: Iso/iec 14443 Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.3.8 TypeBFraming
Defines the framing for ISO/IEC 14443 B communication.
Table 80.
Table 81.
Bit
Symbol
Access
Bit
7
6
5
4 to 2
1 to 0
Symbol
NoTxSOF
NoTxEOF
EOFWidth
CharSpacing[2:0]
SOFWidth[1:0]
TypeBFraming register (address: 17h) reset value: 0011 1011b, 3Bh bit allocation
TypeBFraming register bit descriptions
NoTxSOF
R/W
7
Rev. 3.4 — 26 January 2010
NoTxEOF EOFWidth
Value Description
1
0
1
0
1
0
00
01
10
11
R/W
6
056634
TxCoder suppresses the SOF
TxCoder does not suppress SOF
TxCoder suppresses the EOF
TxCoder does not suppress the EOF
set the EOF to a length to 11 ETU
set the EOF to a length of 10 ETU
set the EGT length between 0 and 7 ETU
sets the SOF to a length to 10 ETU LOW and 2 ETU HIGH
sets the SOF to a length of 10 ETU LOW and 3 ETU HIGH
sets the SOF to a length of 11 ETU LOW and 2 ETU HIGH
sets the SOF to a length of 11 ETU LOW and 3 ETU HIGH
R/W
5
4
CharSpacing[2:0]
R/W
3
ISO/IEC 14443 reader IC
2
MFRC531
© NXP B.V. 2010. All rights reserved.
SOFWidth[1:0]
1
R/W
60 of 116
0