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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： | 4/26页 |
| 文件大小： | 410K |
| 代理商： | E5561 |
12
e5561
4699A–RFID–04/03
Data Streams
Reading begins with block 1 (LSB first). Depending on the selected bit count, block 1 is
followed by block 2, 3 and 4 (128-bit bit count) or just by block 4 (64-bit bit count). The ID
code is transmitted in loop or interrupted by the selected terminator, respectively. To
avoid malfunction, the mode register is refreshed continuously with the content of
EEPROM blocks 0 and 9 during reading of block 4. The data streams of the ID mode are
shown in Figure 12.
Figure 12. ID Mode Data Streams
Terminators
Terminators are a special pattern to mark the beginning and the end of a code. The ter-
minators may be used to synchronize the base station. They can be detected reliably
since they are a violation of the modulation scheme. After a terminator is sent, transmis-
sion of the first bit of the ID code starts with damping on for a certain detection (if
Bi-phase modulation is used).
Note:
Terminator 2 is only available in ID mode; all other modes make use of terminator 1.
Figure 13. Terminators
block 1
block 2
block 3
block 4
Terminator
block 1
block 2
block 3
block 4
Terminator
128-bit Bit-count with Terminator
block 1
block 4
Terminator
block 1
block 4
Terminator
64-bit Bit-count with Terminator
block 1
block 2
block 3
block 4
block 1
block 2
block 3
block 4
128-bit Bit-count without Terminator
block 1
block 4
block 1
block 4
64-Bit bit-count without Terminator
Terminator [3-bit period]
bit period
first bit
last bit
1.5-bit period
(damping = off)
Terminator 1
Terminator 2
Terminator if bitrate = RF/64
bit period
first bit
last bit
208 FCs
128 FCs
16
(damping = off)
first bit
Terminator if bitrate = RF/32
last bit
176 FCs
128 FCs
16
(damping = off)
bit period
64
32
[416 FCs]
[384 FCs]
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