CR14_10 STMICROELECTRONICS [STMicroelectronics], CR14_10 Datasheet - Page 5
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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)
CR14
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
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Figure 10.
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Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Logic block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SO pin connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CR14 application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maximum R
I²C bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
CR14 I²C write mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
I²C polling flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
CR14 I²C read modes sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Host-to-CR14 transfer: I²C write to parameter register . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CR14-to-host transfer: I²C random address read from parameter register . . . . . . . . . . . . 22
CR14-to-host transfer: I²C current address read from parameter register . . . . . . . . . . . . . 22
Host-to-CR14 transfer: I²C write to I/O frame register for ISO14443B . . . . . . . . . . . . . . . . 23
CR14-to-host transfer: I²C random address read from I/O frame register for ISO14443B 23
CR14-to-host transfer: I²C current address read from I/O frame register for ISO14443B . 24
Host-to-CR14 transfer: I²C write to slot marker register . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
CR14-to-host transfer: I²C random address read from slot marker register . . . . . . . . . . . 24
CR14-to-host transfer: I²C current address read from slot marker register . . . . . . . . . . . . 25
Wave transmitted using ASK modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CR14 request frame character format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Request start of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Request end of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Wave received using BPSK sub-carrier modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Answer start of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Answer end of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Example of a complete transmission frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CRC transmission rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Standard TAG command: request frame transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Standard TAG command: answer frame reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Standard TAG command: complete TAG access description. . . . . . . . . . . . . . . . . . . . . . . 32
Anti-collision ST short range memory sequence (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Anti-collision ST short range memory sequence continued . . . . . . . . . . . . . . . . . . . . . . . . 34
I²C AC testing I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
I²C AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CR14 synchronous timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
SO16 narrow - 16 lead plastic small outline, 150 mils body width, Package outline . . . . . 42
L
value versus bus capacitance (C
Doc ID 11922 Rev 2
BUS
) for an I
²
C bus . . . . . . . . . . . . . . . . . . 11
List of figures
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