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| 型號(hào)： | HCS473-SLROM |
| 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)： | 29/68頁(yè) |
| 文件大?。?/td> | 1629K |
| 代理商： | HCS473-SLROM |
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2002 Microchip Technology Inc.
Preliminary
DS40035C-page 27
HCS473
3.2.3.4
READ Command
The transponder reader follows the 3-bit READ com-
mand with one of eight possible 3-bit address options
indicating which 16-bit EEPROM word to retrieve
(Table 3-5) and a 2-bit CRC calculated over the com-
mand and address bits.
The HCS473 retrieves the data and returns the 16-bit
response by creating a 32-bit value containing two cop-
ies of the response (Figure 3-15).
RFRSP determines if the response will be transmitted
on the DATA pin. If enabled, the response will follow the
selected Encoder mode code hopping format with the
hopping code replaced with the 32-bit response. The
transmissions will contain a button code of ‘0000’.
LFRSP determines if the response will be transmitted
on the LC pins. The LC pin response will be the 32-bit
result, modulated PPM format.
If both RFRSP and LFRSP are enabled, the HCS473
will send the response on the DATA pin immediately fol-
lowed by the PPM response on the LC pins. Refer to
Section 3.2.1.7 for further response path details.
The following locations are available to read:
The 64-bit general purpose user EEPROM.
The 32-bit serial number. The serial number is
also transmitted in each code hopping transmis-
sion.
The16-bit device identifiers #1 and #2.
The next command must begin T
CMD
after the read
response.
FIGURE 3-15:
READ SEQUENCE (RF RESPONSE EXAMPLE)
T
SF
ACK
CMD
ADR
CRC
T
CMD
‘100
2
’
3 bits 2 bits
T
READ
RESPONSE
‘
‘
‘
b
b
L
M
b
Address
Command
M
L
C
C
CRC
T
FINH
P
H
R
(
F
T
READ
RF Response
(DATA Pin)
Inductive In
(LC Pins)
RF Response (RFRSP=1)
Wake Sequence
or
Previous Command
Response
Optional Next
Command
T
CMD
b
b
b
Next
Command
T
CMD
T
CMD
T
CMD
T
CMD
with consecutive command
or if waiting for LF response
M
L
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| HCS473-SLSQTP | Code Hopping Encoder and Transponder |
| HCS473IPQTP | Code Hopping Encoder and Transponder |
| HCS473IPROM | Code Hopping Encoder and Transponder |
| HCS473IPSQTP | Code Hopping Encoder and Transponder |
| HCS473ISLQTP | Code Hopping Encoder and Transponder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCS473SLSQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473-SLSQTP | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473T/SL | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 w/ Passive Entry RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| HCS473T-I/SL | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 w/ Passive Entry RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時(shí)間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| HCS4870C | 制造商:Power-One 功能描述:POWER SUPPLY |
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