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| 型号： | HCS473SLSQTP |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | Code Hopping Encoder and Transponder |
| 中文描述： | 跳码编码器和转发器 |
| 文件页数： | 29/68页 |
| 文件大小： | 1629K |
| 代理商： | HCS473SLSQTP |
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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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相关代理商/技术参数 |
参数描述 |
|---|---|
| HCS473-SLSQTP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473T/SL | 功能描述:编码器、解码器、复用器和解复用器 w/ Passive Entry RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| HCS473T-I/SL | 功能描述:编码器、解码器、复用器和解复用器 w/ Passive Entry RoHS:否 制造商:Micrel 产品:Multiplexers 逻辑系列:CMOS 位数: 线路数量（输入/输出）:2 / 12 传播延迟时间:350 ps, 400 ps 电源电压-最大:2.625 V, 3.6 V 电源电压-最小:2.375 V, 3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-44 封装:Tray |
| HCS4870C | 制造商:Power-One 功能描述:POWER SUPPLY |
| HCS500 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Memory Programming Specification |
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