SRI512-SBN18/1GE STMicroelectronics, SRI512-SBN18/1GE Datasheet - Page 12

• Manufacturer Part Number: SRI512-SBN18/1GE
• Description: IC MEM 13.56MHZ 512BIT EEPROM
• Manufacturer: STMicroelectronics
• Series: SRI512r

Specifications of SRI512-SBN18/1GE

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO14443-B
• Package / Case: Wafer
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Data transfer
3.2.3
3.3
12/47
Answer end of frame
The EOF shown in
●
●
Figure 9.
Transmission frame
Between the request data transfer and the answer data transfer, all ASK and BPSK
modulations are suspended for a minimum time of t
to switch from Transmission to Reception mode. It is repeated after each frame. After t
13.56 MHz carrier frequency is modulated by the SRI512 at 847 kHz for a period of
t
by the SRI512 forms the start bit (‘0’) of the answer SOF. After the falling edge of the answer
EOF, the reader waits a minimum time, t
SRI512.
Figure 10. Example of a complete transmission frame
1
Sent by the
Sent by the
= 128/ƒ
Reader
SRI512
followed by 10 ETUs at logic-0,
followed by 2 ETUs at logic-1.
ETU
S
to allow the reader to synchronize. After t
SOF
at 106kb/s
12 bits
Answer end of frame
0
b0
Cmd
Input data transfer using ASK
10 bits
Figure 9
0
b1
Data
10 bits
t
DR
0
b2
is composed of:
CRC
10 bits
Doc ID 13263 Rev 5
0
b3
CRC
10 bits
0
b4
EOF
2
10 bits
, before sending a new request frame to the
0
b5
128/fs
t
0
f s =847.5kHz
0
b6
0
1
= 128/ƒ
128/fs
Sync
, the first phase transition generated
t
1
Output data transfer using BPSK
0
b7
SOF
12 bits
S
. This delay allows the reader
0
b8
Data CRC CRC
10 bits
10 bits
0
b9
10 bits
1
b10
EOF
t
12 bits
2
ai07665
Ai10798
1
b11
SRI512
SOF
0
, the