- 您现在的位置：买卖IC网 > PDF目录371784 > HCS473PSQTP (Microchip Technology Inc.) Code Hopping Encoder and Transponder PDF资料下载
参数资料
| 型号： | HCS473PSQTP |
| 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： | 17/68页 |
| 文件大小： | 1629K |
| 代理商： | HCS473PSQTP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页
2002 Microchip Technology Inc.
Preliminary
DS40035C-page 15
HCS473
FIGURE 3-5:
QUE COUNTER TIMING DIAGRAM
3.1.4.5
Counter Select (CNTSEL)
The counter select option selects between a 16-bit or
20-bit counter. This option changes the way the 32-bit
hopping portion is constructed, as indicated in
Figure 3-2. The 16-bit counter format additionally
includes two overflow bits for increasing the synchroni-
zation counter range, see Section 3.1.7.
CNTSEL options:
16-bit synchronization counter
20-bit synchronization counter
3.1.4.6
Low Voltage Trip Point Select
(VLOWSEL)
The HCS473’s battery voltage detector detects when
the supply voltage drops below a predetermined value.
The value is selected by the Low Voltage Trip Point
Select (VLOWSEL) configuration option (Table 3-6).
VLOWSEL options:
2.2V trip point
3.3V trip point
The low voltage detector result (VLOW) is included in
Hopping code transmissions allowing the receiver to
indicate when the transmitter battery is low (Figure 3-
2). The HCS473 also indicates a low battery condition
by changing the LED operation (Section 3.1.5).
The HCS473 samples the internal low voltage detector
at the end of each code word’s first preamble bit. The
transmitted VLOW status will be a ‘0’ as long as the low
voltage detector indicates V
DD
is above the selected
low voltage trip point. VLOW will change to a ‘1’ if V
DD
drops below the selected low voltage trip point.
TABLE 3-1:
VLOW STATUS BIT
3.1.4.7
PLL Interface Select (PLLSEL)
The S3/RFEN pin may be configured as an RF enable
output to an RF PLL. The pin’s behavior is coordinated
with the DATA pin to activate a typical PLL in either
ASK or FSK mode.
The PLL Interface (PLLSEL) configuration option con-
trols the output as shown for Encoder operation in
Figure 3-6. Please refer to Section 3.2.8 for RFEN
behavior during LF communication.
PLLSEL options:
ASK PLL Setup
FSK PLL Setup
3.1.4.8
RF Enable Output (RFEN)
The S3/RFEN pin of the HCS473 can be configured to
function as an RF enable output signal. When enabled,
the pin is driven high whenever data is transmitted
through the DATA pin; the S3/RFEN pin can therefore
not be used as an input in this configuration. The RF
enable option bit functions in conjunction with the PLL
interface select option, PLLSEL.
RFEN options:
S3/RFEN pin functions as S3 switch input only
S3/RFEN pin functions as RFEN output only
t
≥
T
DB
Button Input
Sx
Code Words
Transmitted
T
DB
≤
t
≤
T
QUE
QUE1:0 = 00
2
Synch CNT = X
Transmission:
QUE1:0 = 01
2
Synch CNT = X+1
Transmission:
T
DB
1st Button Press
All Buttons Released
2nd Button Press
VLOW
Description
0
V
DD
is above selected trip voltage
V
DD
is below selected trip voltage
1
相关PDF资料 |
PDF描述 |
|---|---|
| HCS473SLQTP | Code Hopping Encoder and Transponder |
| HCS473SLROM | Code Hopping Encoder and Transponder |
| HCS473SLSQTP | Code Hopping Encoder and Transponder |
| HCS509 | KEELOQ Code Hopping Encoder Product Brief*(KeeLoq 译码器，是NTQ109和NTQ106的替代品) |
| HCS573KMSR | Radiation Hardened Octal Transparent Latch, Three-State |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HCS473-PSQTP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473SLQTP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473-SLQTP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473SLROM | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
| HCS473-SLROM | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Code Hopping Encoder and Transponder |
发布紧急采购，3分钟左右您将得到回复。