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參數(shù)資料
| 型號(hào)： | HCS473IPROM |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Code Hopping Encoder and Transponder |
| 中文描述： | 跳碼編碼器和轉(zhuǎn)發(fā)器 |
| 文件頁(yè)數(shù)： | 35/68頁(yè) |
| 文件大?。?/td> | 1629K |
| 代理商： | HCS473IPROM |
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2002 Microchip Technology Inc.
Preliminary
DS40035C-page 33
HCS473
FIGURE 3-22:
Calculating Communication T
E
3.2.8
RFEN DURING LF
COMMUNICATION (Figure 3-23)
3.2.8.1
Wake-up Sequence
The wake-up Acknowledge sequence has the shortest,
but fixed, PLL setup time, 1LF
TE
.
3.2.8.2
Transponder Select Sequence
PLL setup occurs on the rising edge of the first VID bit
in anticipation of the TID Acknowledge. The setup time
before the ACK begins is therefore a function of...
LF baud rate
VID value
TID value
3.2.8.3
ACK Response Sequences
Concluding with CRC
Command sequences ending with CRC bits and
expecting an Acknowledge response have a similar
PLL setup sequence. This includes “Present Transport
Code”, “Write” and “Anticollision Off”.
PLL setup occurs on the rising edge of the first CRC bit
in anticipation of the Acknowledge. The setup time is
therefore a function of...
LF baud rate
CRC value
Response time: T
TPACK
, T
WRT
, T
AOACK
.
3.2.8.4
Data Response Sequences
Concluding with CRC
Command sequences ending with CRC bits and
expecting data response (code hopping word) have a
similar PLL setup sequence. This includes “IFF”,
“Read” and “Request Hopping Code”.
PLL setup occurs on the rising edge of the first CRC bit
in anticipation of the data transmission. The setup time
is therefore a function of...
LF baud rate
CRC value
Response time: T
IFF
, T
READ
, T
HOP
.
Communication from reader to HCS473
Communication from HCS473 to reader
8LF
TE
8LF
TE
T
SF
Command
T
CMD
SKIPACK = 0 - Field Acknowledge sent when device wakes
Inductive
(LC)
RF
Response
(DATA)
125 kHz Field
(on LC pins)
T
CMD
b
b
b
3LF
TE
3LF
TE
3LF
TE
Simultaneous LF
Acknowledge
(LFRSP=1)
RF Acknowledge
(RFRSP=1)
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相關(guān)代理商/技術(shù)參數(shù) |
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| HCS473IPSQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
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| HCS473ISLSQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473PQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
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