- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359304 > TMS320M642AGDK6 (Texas Instruments, Inc.) 1A, 52kHz (250kHz Max) Current Mode PWM Control Circuit with 8.4V UVLO Threshold and 96% Max Duty Cycle; Package: SOIC 14 LEAD; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2500 PDF資料下載
參數(shù)資料
| 型號： | TMS320M642AGDK6 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1A, 52kHz (250kHz Max) Current Mode PWM Control Circuit with 8.4V UVLO Threshold and 96% Max Duty Cycle; Package: SOIC 14 LEAD; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2500 |
| 中文描述： | 視頻/影像定點數(shù)字信號處理器 |
| 文件頁數(shù)： | 44/123頁 |
| 文件大?。?/td> | 1205K |
| 代理商： | TMS320M642AGDK6 |
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頁第41頁第42頁第43頁當前第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頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁
www.ti.com
3.6.2
Watchdog Block
/512
OSCCLK
WDCR (WDPS(2:0))
WDCLK
WDCNTR(7:0)
WDKEY(7:0)
Bad Key
Good Key
1
0
1
WDCR (WDCHK(2:0))
Bad
WDCHK
Key
WDCR (WDDIS)
Clear Counter
SCSR (WDENINT)
Watchdog
Prescaler
Generate
Output Pulse
(512 OSCCLKs)
8-Bit
Watchdog
Counter
CLR
WDRST
WDINT
Watchdog
55 + AA
Key Detector
XRS
Core-reset
WDRST
(A)
Internal
Pullup
TMS320F2808, TMS320F2806
TMS320F2801, UCD9501
Digital Signal Processors
SPRS230F–OCTOBER 2003–REVISED SEPTEMBER 2005
Normally, when the input clocks are present, the watchdog counter decrements to initiate a watchdog
reset or WDINT interrupt. However, when the external input clock fails, the watchdog counter stops
decrementing (i.e., the watchdog counter does not change with the limp-mode clock). In addition to this,
the device will be reset and the “Missing Clock Status” (MCLKSTS) bit will be set. These conditions could
be used by the application firmware to detect the input clock failure and initiate necessary shut-down
procedure for the system.
NOTE
Applications in which the correct CPU operating frequency is absolutely critical should
implement a mechanism by which the DSP will be held in reset, should the input clocks
ever fail. For example, an R-C circuit may be used to trigger the XRS pin of the DSP,
should the capacitor ever get fully charged. An I/O pin may be used to discharge the
capacitor on a periodic basis to prevent it from getting fully charged. Such a circuit would
also help in detecting failure of the flash memory and the V
DD3VFL
rail.
The watchdog block on the 280x is similar to the one used on the 240x and 281x devices. The watchdog
module generates an output pulse, 512 oscillator clocks wide (OSCCLK), whenever the 8-bit watchdog up
counter has reached its maximum value. To prevent this, the user disables the counter or the software
must periodically write a 0x55 + 0xAA sequence into the watchdog key register which will reset the
watchdog counter.
Figure 3-12
shows the various functional blocks within the watchdog module.
A.
The WDRST signal is driven low for 512 OSCCLK cycles.
Figure 3-12. Watchdog Module
The WDINT signal enables the watchdog to be used as a wakeup from IDLE/STANDBY mode.
44
Functional Overview
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMS320M642AGDK7 | Video/Imaging Fixed-Point Digital Signal Processor |
| TMS320E17 | 200mA, 40kHz PWM Control Circuit with 6.4V UVLO Threshold and 48% Max Duty Cycle; Package: SOIC 16 LEAD; No of Pins: 16; Container: Tape and Reel; Qty per Container: 2500 |
| TMS320LC2402 | 32A 24-32V Transient Suppressor ; Package: Can Button; No of Pins: 2; Container: Bulk; Qty per Container: 5000 |
| TMS320LC2402PZ | Zero Voltage Switch Power Controller for Triacs; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50 |
| TMS320M642AZDK6 | 1A, 52kHz (250kHz Max) Current Mode PWM Control Circuit with 16V UVLO Threshold and 48% Max Duty Cycle; Package: SOIC-8 Narrow Body; No of Pins: 8; Container: Tape and Reel; Qty per Container: 2500 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS320M642AGDK7 | 制造商:Texas Instruments 功能描述:DSP FIX PT 32BIT 720MHZ 5760MIPS 548FCBGA - Trays |
| TMS320M642AGNZ5 | 制造商:Texas Instruments 功能描述:TMS320DM642A PG2 548PIN FCBGA 500 MHZ - Trays |
| TMS320M642AGNZ6 | 制造商:Texas Instruments 功能描述:TMS320DM642A PG2 548PIN FCBGA 600 MHZ - Trays |
| TMS320M642AGNZ6ADB | 制造商:Texas Instruments 功能描述: |
| TMS320M642AGNZ7 | 制造商:Texas Instruments 功能描述:DSP FIX PT 32BIT 720MHZ 5760MIPS 548FCBGA - Trays |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。