- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385001 > TMS37122 (Texas Instruments, Inc.) TIRIS Automotive Devices Analog Front End IC TMS37122 PDF資料下載
參數(shù)資料
| 型號： | TMS37122 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | TIRIS Automotive Devices Analog Front End IC TMS37122 |
| 中文描述： | 提里斯汽車設(shè)備的模擬前端集成電路TMS37122 |
| 文件頁數(shù)： | 41/73頁 |
| 文件大?。?/td> | 1189K |
| 代理商： | TMS37122 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁當前第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁
41
August ’01
Chapter 2. Electrical Description
2.10.3.11Wake Pattern Waiting Time 'C_WAIT'
If the Wake Pattern check detected no modulation after internal wake-up, it can be assumed
that noise was the reason for activation. A initialization and return to the Standby Mode after
a reasonable waiting time is meaningful. Therefore a counter is loaded with cwait. The
counter counts down using CLKI as source. The resulting waiting time must be adapted to
the Wake-up Times (tWAKE) used in the system. Typically the Wake-up Time is shorter than
10ms. In best case the Identification Device internally wakes up 3 ms after beginning of wake
period. So the Control Unit has to wait at least 7 ms until begin of modulation (see Table 7).
If the Battery Backup function is used, longer Wake-up times will be used. Assuming that
reaction times of more than 200 ms will not be acceptable by the system user and the mini-
mum communication time is 50 ms, the maximum Wake-up Time will be around 150 ms. Be-
cause of the exponential rise behavior, the charge voltage VCL will reach 63% of the
maximum voltage (~3 V) after 30 ms. At this time enough voltage is available at VCCO to
initialize the Microcomputer (~2.5 V). Because the initialization will need some time
WDEEN will not be set before the 30 ms are gone and the Wake Pattern will be received latest
120 ms after start of Wake-up Time.
The Wake Pattern Waiting Time is calculated with the following formula:
twait = cwait / fTX
Table 6: Counter Definition for Pulse Position Demodulation
Telegram Duration
DEC
ctelegr
ttelegr
nom.[ms]
MSB
LSB
0
4096
30.5
0
0
0
0
1
8192
61.0
0
0
0
1
2
12288
91.6
0
0
1
0
3
16384
122.1
0
0
1
1
4
20480
152.6
0
1
0
0
5
24576
183.1
0
1
0
1
6
28672
213.7
0
1
1
0
7
32768
244.2
0
1
1
1
8
36864
274.7
1
0
0
0
9
40960
305.2
1
0
0
1
10
45056
335.7
1
0
1
0
11
49152
366.3
1
0
1
1
12
53248
396.8
1
1
0
0
13
57344
427.3
1
1
0
1
14
61440
457.8
1
1
1
0
15
65536
488.4
1
1
1
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMS37134 | Entry Transponder IC |
| TMS4161 | GRAPHICS SYSTEM PROCESSOR |
| TMS3469910000 | GRAPHICS SYSTEM PROCESSOR |
| TMS4461 | GRAPHICS SYSTEM PROCESSOR |
| TMSSTDB10 | GRAPHICS SYSTEM PROCESSOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS37122DPWRG4 | 制造商:Texas Instruments 功能描述:3D Analog Front-end, TITL |
| TMS37145TEAIE | 制造商:Texas Instruments 功能描述: |
| TMS37145TEAIEG | 制造商:Texas Instruments 功能描述: |
| TMS37157IRSARG4 | 功能描述:RFID應(yīng)答器 Pass Lo Freq Interf Dev W/ EEPROM RoHS:否 制造商:Murata 存儲容量:512 bit 工作溫度范圍:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel |
| TMS3734DFNR | 制造商:Texas Instruments 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。