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参数资料
| 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： | 16/68页 |
| 文件大小： | 1629K |
| 代理商： | HCS473SLSQTP |
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HCS473
DS40035C-page 14
Preliminary
2002 Microchip Technology Inc.
3.1.4
ENCODER MODE OPTIONS
The following HCS473 configuration options configure
transmission characteristics of the information exiting
the DATA pin:
Modulation select (MSEL)
Header select (HSEL)
Extended serial number (XSER)
Queue counter enable (QUEN)
Counter select (CNTSEL)
Low voltage trip point (VLOWSEL)
PLL interface select (AFSK)
RF enable output (RFEN)
Seed button code (SDBT)
Time before Seed (SDTM)
Limited Seed (SDLM)
Seed mode (SDMD)
RF baud rate select (RFBSL)
Guard time select (GSEL)
Minimum code words (MTX)
Timeout select (TSEL)
Long preamble enable (LPRE)
Long preamble length (LPRL)
Preamble duty cycle (PRD)
The following sections detail each configuration’s avail-
able options. All timing values specified are subject to
the specified oscillator variation.
3.1.4.1
Modulation Format (MSEL)
The Modulation format option selects the modulation
format for data output from the DATA pin; most often
transmitted via RF.
MSEL options:
Pulse Width Modulation (PWM), Figure 3-3
Manchester Modulation, Figure 3-4
3.1.4.2
Header Select (HSEL)
The synchronization header is typically used by the
receiver to adjust bit sampling appropriate to the trans-
mitter’s current speed; as the transmitter’s RC oscilla-
tor varies with temperature and voltage, so will the
transmission’s timing.
HSEL options:
4 RF
TE
10 RF
TE
3.1.4.3
Extended Serial Number (XSER)
The Extended Serial Number option determines
whether the HCS473 transmits a 28 or 32-bit serial
number.
When configured for a 28-bit serial number, the Most
Significant nibble of the 32 bits reserved for the serial
number is replaced with a copy of the 4-bit button sta-
tus, Figure 3-2.
XSER options:
28-bit serial number
32-bit serial number
3.1.4.4
Queue Counter (QUEN)
The QUE counter can be used to request secondary
decoder functions using only a single transmitter but-
ton. Typically a decoder must keep track of incoming
transmissions to determine when a double button press
occurs, perhaps an unlock all doors request. The QUE
counter removes this burden from the decoder by
counting multiple button presses and including the
QUE counter value in the last two bits of the 69-bit code
word, (Figure 3-2). If QUEN is disabled, the transmis-
sion will consist only of 67 bits as the QUE bits field is
not transmitted.
Que counter functionality is enabled with the QUEN
configuration option. The 2-bit QUE counter is incre-
mented each time an active button input is released for
at least the Debounce Time (T
DB
), then re-activated
(button pressed again) within the Queue Time (T
QUE
),
Figure 3-5. The counter increments up from 0 to a max-
imum of 3, returning to 0 only after a different button
activation or after button activations spaced greater
than the Queue Time (T
QUE
) apart.
The current transmission aborts, after completing the
minimum number of code words (Section 3.1.4.15),
when the active button inputs are released. A button re-
activation within the queue time (T
QUE
) then initiates a
new transmission (new synchronization counter,
encrypted data) using the updated QUE value. Button
combinations are queued the same as individual but-
tons.
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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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