CR14_10 STMICROELECTRONICS [STMicroelectronics], CR14_10 Datasheet - Page 39

• Manufacturer Part Number: CR14_10
• Description: ISO14443 type-B contactless coupler chip with anti-collision and CRC management
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

CR14
Figure 35. CR14 synchronous timing
Table 13.
f
MI
t
t
t
t
t
CC
RFR
RFSBL
JIT
0
1
RF OUT ASK Modulated Signal
V RFOUT
FRAME transmission between the reader and the contactless device
FRAME transmitted by the PICC in BPSK
Data jitter on FRAME transmitted by the CR14 in ASK
CARRIER
Symbol
t DR
, t
RFF
1
RF
0
t RFSBL
t POR
External Oscillator Frequency
Carrier Modulation Index
10% Rise and Fall time
ASK modulation bit jitter
Antenna Reversal delay
Synchronization delay
OUT
Pulse Width on RF
DATA
t DR
AC characteristics
START
1
t RFSBL
t JIT
0
A
Parameter
EOF
OUT
t RFSBL
t JIT
B
t RFF
t 0
Doc ID 11922 Rev 2
t RFSBL
t JIT
847kHz
t 1
t RFSBL
V
MI=(A-B)/(A+B)
1 ETU = 128/f
CR14 to PICC
Min = 64/f
Min = 80/f
t JIT
CC
t RFR
SOF
= 5 V
Condition
FRAME transmitted by the CR14 in ASK
t DA
S
S
t RFSBL
1 1 0 DATA
t JIT
CC
t DA
13.553
10
0.5
9.44
-0.5
75
94
Min.
1 0 DATA
DC and AC parameters
13.567
14
1.5
0.5
Max.
1 0
f CC
MHz
%
µs
µs
µs
µs
µs
ai12056
Unit
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