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| 型号： | E5561 |
| 英文描述： | e5561 Advance Information [Updated 4/03. 26 Pages] Read/Write transponder IC for contactless RF identification for highly sophisticated security applications. |
| 中文描述： | e5561推进信息[更新4 / 03。 26页]读/写非接触式射频转发器的高度复杂的安全应用识别芯片。 |
| 文件页数： | 6/26页 |
| 文件大小： | 410K |
| 代理商： | E5561 |
14
e5561
4699A–RFID–04/03
Figure 16. OP Codes
Programming Mode
Programming the EEPROM of the e5561 is carried out blockwise, i.e., every single
block has to be programmed separately. The programming-mode write sequence is
shown in Figure 17. After OPcode 10, the 32 data bits have to be sent followed by the
four address bits specifiying the block to be programmed (each LSB first). The
sequence is completed by sending an EOT (end of transmission), i.e., more than 64
field clocks without any gap.
Figure 17. Programming Mode Write Sequence
When the entire write sequence has been written to the e5561, programming may pro-
ceed. There is a 64-clock delay between the end of writing and the start of
programming. During this time, the EEPROM's programming voltage V
PP is measured
and the lock-bit for the block to be programmed is examined. Further, V
PP is continually
monitored throughout the programming cycle. If V
PP is too low, the chip starts error han-
dling. The programming time is 16 ms (including erase) with a field clock frequency of
125 kHz.
Figure 18. Programming
1
Programming mode
Crypto mode
0
Start gap
more data...
Stop mode
> 64 clocks
0
more data...
1
10
01
11
Direct-access mode
1
10
Data bits
31
0
ADR 3
0
EOT
OP code
data bits
block address
0 . . . . . .9
16 ms
Write mode
Check V
PP
V
PP on
Operation
write
and lock ok?
erase EEPROM
program EEPROM
read
0.512 ms
EOT received
programming ends
programming starts
V
PP
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