- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1931 > KSZ8851-32MQLI (Micrel Inc)IC CTLR MAC/PHY NON PCI 128PQFP PDF資料下載
參數(shù)資料
| 型號(hào)： | KSZ8851-32MQLI |
| 廠商： | Micrel Inc |
| 文件頁(yè)數(shù)： | 46/88頁(yè) |
| 文件大小： | 0K |
| 描述： | IC CTLR MAC/PHY NON PCI 128PQFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 控制器類型： | 以太網(wǎng)控制器，MAC/PHY |
| 接口： | 總線 |
| 電源電壓： | 1.8V，2.5V，3.3V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-BFQFP |
| 供應(yīng)商設(shè)備封裝： | 128-PQFP（14x20） |
| 包裝： | 托盤 |
| 其它名稱： | 576-3630 KSZ8851-32MQLI-ND |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)當(dāng)前第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)
PIC16F8X
1998 Microchip Technology Inc.
DS30430C-page 51
8.11
Watchdog Timer (WDT)
The Watchdog Timer is a free running on-chip RC
oscillator
which
does
not
require
any
external
components. This RC oscillator is separate from the
RC oscillator of the OSC1/CLKIN pin. That means that
the WDT will run even if the clock on the OSC1/CLKIN
and OSC2/CLKOUT pins of the device has been
stopped, for example, by execution of a SLEEP
instruction. During normal operation a WDT time-out
generates a device RESET. If the device is in SLEEP
mode, a WDT Wake-up causes the device to wake-up
and continue with normal operation. The WDT can be
permanently disabled by programming configuration bit
WDTE as a ’0’ (Section 8.1).
8.11.1
WDT PERIOD
The WDT has a nominal time-out period of 18 ms, (with
no
prescaler).
The
time-out
periods
vary
with
temperature, VDD and process variations from part to
part (see DC specs). If longer time-out periods are
desired, a prescaler with a division ratio of up to 1:128
can be assigned to the WDT under software control by
writing to the OPTION_REG register. Thus, time-out
periods up to 2.3 seconds can be realized.
The CLRWDT and SLEEP instructions clear the WDT
and the postscaler (if assigned to the WDT) and pre-
vent it from timing out and generating a device
RESET condition.
The TO bit in the STATUS register will be cleared upon
a WDT time-out.
8.11.2
WDT PROGRAMMING CONSIDERATIONS
It should also be taken into account that under worst
case conditions (VDD = Min., Temperature = Max., max.
WDT prescaler) it may take several seconds before a
WDT time-out occurs.
FIGURE 8-18: WATCHDOG TIMER BLOCK DIAGRAM
TABLE 8-7
SUMMARY OF REGISTERS ASSOCIATED WITH THE WATCHDOG TIMER
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
2007h
Config. bits
(2)
PWRTE(1)
WDTE
FOSC1
FOSC0
(2)
81h
OPTION_
REG
RBPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
1111 1111
Legend: x = unknown. Shaded cells are not used by the WDT.
Note 1:
See Figure 8-1 and Figure 8-2 for operation of the PWRTE bit.
2:
From TMR0 Clock Source
To TMR0 (Figure 6-6)
Postscaler
WDT Timer
M
U
X
PSA
8 - to -1 MUX
PSA
WDT
Time-out
1
0
1
WDT
Enable Bit
PS2:PS0
8
MUX
Note: PSA and PS2:PS0 are bits in the OPTION_REG register.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KSZ8851-32MQL | IC CTLR MAC/PHY NON PCI 128PQFP |
| KSZ8851SNLI TR | IC ETHERNET CTLR 1PORT PCI 32MLF |
| KSZ8862-16MQL | IC SWITCH 10/100 16BIT 128-PQFP |
| KSZ8862-32MQL | IC ETHERNET SW 2PORT BUS 128PQFP |
| KSZ8863MLLI | IC ETHERNET SWITCH 3PORT 48-LQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8851MLL | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Single Port MAC/PHY Controller with Non PCI Interface |
| KSZ8851MQL | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Single Port MAC/PHY Controller with Non PCI Interface |
| KSZ8851SNL | 功能描述:IC CTLR MAC/PHY NON-PCI 32-QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱:Q6396337A |
| KSZ8851SNL TR | 功能描述:以太網(wǎng) IC Single Ethernet Port + SPI Bus Interface (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8851SNL-BBE-EVAL | 功能描述:BOARD EVAL MAC/PHY FOR KSZ8851 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:LinkMD® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。