CR14_10 STMICROELECTRONICS [STMicroelectronics], CR14_10 Datasheet - Page 29
![no-image](/images/no-image-200.jpg)
CR14_10
Manufacturer Part Number
CR14_10
Description
ISO14443 type-B contactless coupler chip with anti-collision and CRC management
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.CR14_10.pdf
(47 pages)
- Current page: 29 of 47
- Download datasheet (407Kb)
CR14
6.7
6.8
6.9
Answer start of frame
The PICC SOF must be compliant with the ISO14443 type-B, and is shown in
●
●
Figure 24. Answer start of frame
Answer end of frame
The PICC EOF must be compliant with the ISO14443 type-B, and is shown in
●
●
Figure 25. Answer end of frame
Transmission frame
The Request Frame transmission must be followed by a minimum delay, t
which no ASK or BPSK modulation occurs, before the Answer Frame can be transmitted. t
is the minimum time required by the CR14 to switch from transmission mode to reception
mode, and should be inserted after each frame. After t
modulated by the PICC at 847kHz for a minimum time of t
to synchronize. After t
bit (‘0’) of the Answer SOF (or the start bit ‘0’ of the first data character in non SOF/EOF
mode).
Ten or eleven Elementary Time Units (ETU) each containing a logical ‘0’,
Two ETUs containing a logical ‘1’.
Ten or eleven Elementary Time Units (ETU) each containing a logical ‘0’,
Two ETUs containing a logical ‘1’
ETU
ETU
b 0
b 0
0
0
b 1
b 1
0
0
1
b 2
b 2
, the first phase transition generated by the PICC represents the start
0
0
b 3
b 3
0
0
Doc ID 11922 Rev 2
b 4
b 4
0
0
CR14 ISO14443 type-B radio frequency data transfer
b 5
b 5
0
0
b 6
b 6
0
0
b 7
b 7
0
0
b 8
b 8
0
0
0
, the 13.56MHz carrier frequency is
1
b 9
b 9
0
0
(see
b 10
b 10
1
1
Table
b 11
b 11
1
1
) to allow the CR14
b 12
b 12
0
1
1
(see
Figure 24
Figure
Table
ai09254
ai09254
25:
), in
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0
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