- 您现在的位置：买卖IC网 > PDF目录97873 > E5551A-FP008 TRANSPONDER|CMOS|SOP|8PIN|PLASTIC PDF资料下载
参数资料
| 型号： | E5551A-FP008 |
| 英文描述： | TRANSPONDER|CMOS|SOP|8PIN|PLASTIC |
| 中文描述： | 转发器|的CMOS |专科| 8引脚|塑料 |
| 文件页数： | 3/21页 |
| 文件大小： | 157K |
| 代理商： | E5551A-FP008 |
e5551
Rev. A2, 19-Apr-00
11 (21)
Start of writing
RF
Read mode
Write mode
(start gap)
Figure 18. Start of writing
Decoder
The duration of the gaps is usually 50 to 150
s. The time
between two gaps is nominally 24 field clocks for a ‘0’
and 56 field clocks for a ‘1’. When there is no gap for more
than 64 field clocks after previous gap, the IDIC exits
write mode; it starts with programming if the correct
number of valid bits were received.
If there is a gap fail – i.e., one or more of the intervals did
represent not a valid ‘0’ or ‘1’ – the IC does not program,
but enters read mode beginning with block 1, bit 1.
Writing Data into the e5551
The e5551 expects a two bit OP-code first. There are two
valid OP-codes (’10‘ and ’11‘). If the OP-code is invalid,
the e5551 starts read mode beginning with block 1 after
the last gap. The OP-code (’10‘) is followed by different
information (see figure 16):
D Standard writing needs the OP-code, the lock bit, the
32 data bits and the 3-bit block address.
D Writing with usePWD set requires a valid password
between OP-code and address/data bits.
D In AOR mode with usePWD, OP-code and a valid
password are necessary to enable modulation.
D The STOP OP-code is used to silence the e5551 (dis-
able damping until power is cycled).
Note: The data bits are read in the same order as written.
STOP OP-Code
The STOP OP-code (‘11’) is used to stop modulation until
a power-on reset occurs. This feature can be used to have
a steady RF field where single transponders are collected
one by one. Each IC is read and than disabled, so that it
does not interfere with the next IC.
Note: The STOP OP-code should contain only the two
OP-code bits to disable the IC. Any additional data sent
will not be ignored, and the IC will not stop modulation.
Standard OP-code
Stop OP-code
0
1
Read mode
Write mode
Start gap
more data ...
> 64 clocks
1
Figure 19. OP-code transmission
Password
When password mode is on (usePWD = 1), the first
32 bits after the OP-Code are regarded as the password.
They are compared bit-by-bit with the contents of
block 7, starting at bit 1. If the comparison fails, the IC
will not program the memory, but restart in read mode at
block 1 once writing has completed.
Notes:
D If PWD is not set, but the IC receives a write
datastream containing any 32 bits in place of a pass-
word, the IC will enter programming mode.
D In password mode, MAXBLK should be set to a value
below 7 to prevent the password from being trans-
mitted by the e5551.
D Every transmission of 2 OP-code bits, 32 password
bits, one lock bit, 32 data bits and 3 address bits
(= 70 bits) needs about 35 ms. Testing all 232 possible
combinations (about 4.3 billion) takes about 40,000 h,
or over four years. This is a sufficient password
protection for a general-purpose IDIC.
相关PDF资料 |
PDF描述 |
|---|---|
| E5552 | read/write identification IC with 1 Kbit memory |
| E5561 | e5561 Advance Information [Updated 4/03. 26 Pages] Read/Write transponder IC for contactless RF identification for highly sophisticated security applications. |
| E629-EDGE629 | 1 GHz Timing Deskew and Quad Fanout Element |
| E6420-EDGE6420 | Per-Pin Electronics Companion DAC |
| E646-EDGE646 | Pin Electronics Driver. Window Comparator. and Switch Matrix |
相关代理商/技术参数 |
参数描述 |
|---|---|
| E5552 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Transponder |
| E555423 | 制造商:Elo Touch Solutions Inc 功能描述:1729L, 17-INCH LCD, CARROLLTOUCH, USB CONTROLLER, GRAY - Bulk |
| E55556-000 | 功能描述:电线鉴定 HTCM-SCE-TP-1/2-4H-4 RoHS:否 制造商:TE Connectivity / Q-Cees 产品:Labels and Signs 类型: 材料:Vinyl 颜色:Blue 宽度:0.625 in 长度:1 in |
| E5561 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:e5561 Advance Information [Updated 4/03. 26 Pages] Read/Write transponder IC for contactless RF identification for highly sophisticated security applications. |
| E5561_06 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Standard Read/Write Crypto Identification IC |
发布紧急采购，3分钟左右您将得到回复。