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參數(shù)資料
| 型號(hào)： | HCS370P |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | KEELOQ Code Hopping Encoder |
| 中文描述： | 而Keeloq跳碼編碼器 |
| 文件頁(yè)數(shù)： | 12/36頁(yè) |
| 文件大小： | 518K |
| 代理商： | HCS370P |
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HCS370
DS41111D-page 12
Preliminary
2002 Microchip Technology Inc.
FIGURE 3-2:
CODE WORD DATA FORMAT (20-BIT COUNTER)
3.2.3.1
A low battery voltage detector onboard the HCS370
can indicate when the operating voltage drops below a
predetermined value. There are two options available
depending on the Low Voltage Trip Point Select
(VLOWSEL) configuration option. The two options pro-
vided are:
A 2.2V nominal level for 3V operation
A 3.2V nominal level for 5V operation
The output of the low voltage detector is checked on
the first preamble pulse of each code word with the
LED momentarily turned off. The V
LOW
bit is transmit-
ted in each code word so the decoder can give an indi-
cation to the user that the transmitter battery is low.
Operation of the LED changes as well to further indi-
cate that the battery is low and needs replacing.
The output of the Low Voltage Detector can also be
latched once it has dropped below the selected value.
The Low Voltage Latch (VLOWL) configuration option
enables this option. If this option is enabled, the detec-
tor level is raised to 3V or 5V once a low battery voltage
has been detected, like a Schmitt Trigger.
This will effectively hold the V
LOW
bit high until the bat-
tery is replaced. If the Low Voltage Latch is enabled,
then the low T
E
after the first preamble pulse can
stretch by 4 ms one time as the latch changes state.
Low Voltage Detector Status (V
LOW
)
Transmission Direction LSB First
Fixed Code Portion (32 Bits)
QUE
2 Bits
CRC
2 Bits
V
LOW
1-Bit
SERIAL NUMBER
(28 Bits)
Q1
Q0 C1
C0
S2 S1 S0
S3
BUT
4 Bits
DISC
8 Bits
Synchronization
Counter
20 Bits
19
0
S2
S1
S0 S3
Hopping Code Portion (32 Bits)
With XSER=0, 20-bit Counter, QUEN=1
Status Information
(5 Bits)
BUT
4 Bits
Fixed Code Portion (32 Bits)
CRC
2 Bits
V
LOW
1-Bit
SERIAL NUMBER
(32 Bits)
C1
C0
BUT
4 Bits
DISC
8 Bits
Synchronization
Counter
20 Bits
19
0
S2
S1
S0 S3
Hopping Code Portion (32 Bits)
With XSER=1, 20-bit Counter, QUEN=0
Status Information
(3 Bits)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HCS370SL | KEELOQ Code Hopping Encoder |
| HCS370ST | KEELOQ Code Hopping Encoder |
| HCS370TIP | KEELOQ Code Hopping Encoder |
| HCS370TISL | KEELOQ Code Hopping Encoder |
| HCS370TIST | KEELOQ Code Hopping Encoder |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCS370SL | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder |
| HCS370ST | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:KEELOQ Code Hopping Encoder |
| HCS370T/SL | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 2-5.5V 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 |
| HCS370T/ST | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 2-5.5V 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 |
| HCS370T-I/SL | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 2-5.5V 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 |
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