- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378123 > R8820LV (Electronic Theatre Controls, Inc.) 16-BIT RISC MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號(hào)： | R8820LV |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16-BIT RISC MICROCONTROLLER |
| 中文描述： | 16位RISC微控制器 |
| 文件頁數(shù)： | 68/98頁 |
| 文件大?。?/td> | 1000K |
| 代理商： | R8820LV |
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頁當(dāng)前第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
R DC
16. Watchdog Timer
R8820LV has one independent watchdog timer, which is programmable.
The watchdog timer is active after reset
and the
RISC DSP Controller
R8820LV
RDC Semiconductor Co.
Rev:1.0
Subject to change without notice
68
timeout count with a maximum count value. The keyed sequence ( 3333h, CCCCh ) must be written to the register (E6h) first
then writing new configuration to the Watchdog Timer Control Register. It is a single write so every one writing to Watchdog
Timer Control Register must follow the rule.
To read the Watchdog Timer Control Register, the keyed sequence (5555h, AAAAh) must be written to the register (E6h) first.
The current count should be reset before modifying the Watchdog Timer timeout period to ensure that an immediate timeout
dose not occur.
Bit 15: ENA
, Enable Watchdog Timer.
Set 1 : Enable Watchdog Timer.
Set 0 : Disable Watchdog Timer.
Bit 14: WRST
, Watchdog Reset.
Set 1: WDT generates a system reset when WDT timeout count is reached.
Set 0 : WDT generates a NMI interrupt when WDT timeout count is reached if the NMIFLAG bit is 0. If the NMIFLAG
bit is 1, the WDT will generate a system reset when timeout.
Bit 13: RSTFLAG
, Reset Flag. When watchdog timer reset event has occurred, hardware will set this bit to 1. This bit will be
cleared by any keyed sequence write to this register or external reset. This bit is 0 after an external reset or 1 after
watchdog timer reset.
Bit 12: NMIFLAG
, NMI Flag. After WDT generates a NMI interrupt, this bit will be set to 1 by H/W. This bit will be cleared
by any keyed sequence write to this register.
Bit 11-8 : Reserved.
Bit 7-0 : COUNT
, Timeout Count. The COUNT setting determines the duration of the watchdog timer timeout interval.
Exponent
2
b. The Exponent of the COUNT setting:
a. The duration equation :
Duration =
/ Frequency
(Bit 7, Bit 6, Bit 5, Bit 4, Bit 3, Bit 2, Bit 1, Bit 0) = ( Exponent)
( 0 , 0 , 0 , 0, 0 , 0 , 0 , 0 ) = (N/A)
( x , x , x , x, x , x , x , x ) = ( 10 )
(x , x , x , x, x , x , 1 , 0 ) = ( 20 )
(x , x , x , x, x , 1 , 0 , 0 ) = ( 21 )
Watchdog Timer Control Register
Offset : E6h
Reset Value : C080h
2
3
0
1
4
5
6
7
8
9
10
11
12
13
14
15
N
R
W
ENA
COUNT
Res
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RA258 | Silicon Rectifier Button-Cells |
| RA2505 | Silicon Rectifier Button-Cells |
| RB5P0010M | Video Interface ICs for TFT-LCDs |
| RB5P0020M | Video Interface ICs for TFT-LCDs |
| RB5P0050M | Video Interface ICs for TFT-LCDs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R8821 | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
| R8822 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:RDC 16 Bit RISC MICRO-CONTROLLER |
| R8822I | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
| R8830 | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
| R8830I | 制造商:RDC 制造商全稱:RDC 功能描述:16-BIT RISC MICROCONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。