T5557 Datasheet, PDF (14/30 Pages) ATMEL Corporation – Multifunctional 330-bit Read/Write RF-Identification IC

OTP Functionality
If the OTP bit is set to ‘1’, all memory blocks are write protected and behave as if all lock
bits are set to 1. If the master key is set to ‘6’ additionally, the T5557 mode of operation
is locked forever (= OTP functionality).
If the master key is set to ‘9’, the test-mode access allows the re-configuration of the tag
again.
Figure 16. Block 0 — Configuration Map in Extended Mode (X-mode)
L 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
10010000
1
Master Key
n5 n4 n3 n2 n1 n0
Modulation PSK-
MAX-
Note 1), 2)
Data Bit Rate
CF
BLOCK
RF/(2n+2)
Direct
0 0 RF/2
0 0 0 0 0 0 1 RF/4
PSK1
0 0 0 0 1 1 0 RF/8
0 Unlocked
PSK2
0 0 0 1 0 1 1 Res.
1 Locked
PSK3
00011
FSK1
00100
FSK2
00101
Manchester 0 1 0 0 0
Biphase ('50) 1 0 0 0 0
Biphase ('57) 1 1 0 0 0
1) If Master Key = 6 and bit 15 set, then test-mode access is disabled and extended mode is active
2) If Master Key = 9 and bit 15 set, then extended mode is enabled
Table 4. T5557 Types of Modulation in Extended Mode
Mode
Direct Data Output Encoding
Inverse Data Output Encoding
FSK1 ⁽¹⁾
FSK/5-/8 ‘0’ = RF/5; ‘1’ = RF/8
FSK/8-/5 ‘0’ = RF/8; ‘1’ = RF/5
FSK2 ⁽¹⁾
FSK/10-/8 ‘0’ = RF/10; ‘1’ = RF/8
FSK/8-/10 ‘0’ = RF/8; ‘1’ = RF/10
PSK1 ⁽²⁾
Phase change when input changes
Phase change when input changes
PSK2 ⁽²⁾
Phase change on bit clock if input high
Phase change on bit clock if input low
PSK3 ⁽²⁾
Phase change on rising edge of input
Phase change on falling edge of input
Manchester
‘0’ = falling edge, ‘1’= rising edge on mid-bit
‘1’ = falling edge, ‘1’= rising edge on mid-bit
Biphase 1 (’50)
‘1’ creates an additional mid-bit change
‘0’ creates an additional mid-bit change
Biphase 2 (’57)
‘0’ creates an additional mid-bit change
‘1’ creates an additional mid-bit change
NRZ
‘1’= damping on, ‘0’= damping off
‘0’= damping on, ‘1’= damping off
Notes: 1. A common multiple of bitrate and FSK frequencies is recommended.
2. In PSK mode the selected data rate has to be an integer multiple of the PSK sub-carrier frequency.
(= FSK1a)
(= FSK2a)
14 T5557
4517E–RFID–02/03