- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372535 > X5643(中文) RTC Module With CPU Supervisor PDF資料下載
參數(shù)資料
| 型號： | X5643(中文) |
| 元件分類： | CPU監(jiān)測 |
| 英文描述： | RTC Module With CPU Supervisor |
| 中文描述： | 時鐘模塊CPU監(jiān)控 |
| 文件頁數(shù)： | 3/23頁 |
| 文件大?。?/td> | 114K |
| 代理商： | X5643(中文) |
X5643/X5645
3
PRINCIPLES OF OPERATION
POWER ON RESET
Application of power to the X5643/X5645 activates a
Power On Reset Circuit. This circuit goes active at about
1V and pulls the RESET/RESET pin active. This signal
prevents the system microprocessor from starting to oper-
ate with insufficient voltage or prior to stabilization of the
oscillator. When Vcc exceeds the device V
200ms (nominal) the circuit releases RESET/RESET,
allowing the processor to begin executing code.
TRIP
value for
LOW VOLTAGE MONITORING
During operation, the X5643/X5645 monitors the V
level and asserts RESET/RESET if supply voltage falls
below a preset minimum V
TRIP
nal prevents the microprocessor from operating in a
power fail or brownout condition. The RESET/RESET sig-
nal remains active until the voltage drops below 1V. It also
remains active until Vcc returns and exceeds V
200ms.
CC
. The RESET/RESET sig-
TRIP
for
WATCHDOG TIMER
The Watchdog Timer circuit monitors the microprocessor
activity by monitoring the WDI input. The micorprocessor
must toggle the CS/WDI pin periodically to prevent a
RESET/RESET signal. The CS/WDI pin must be toggled
from HIGH to LOW prior to the expiration of the watchdog
time-out period. The state of two nonvolatile control bits in
the Status Register determine the watchdog timer period.
The microprocessor can change these watchdog bits, or
they may be “l(fā)ocked” by tying the WP pin LOW and setting
the WPEN bit HIGH.
VCC THRESHOLD RESET PROCEDURE
The X5643/X5645 has a standard Vcc threshold (V
voltage. This value will not change over normal operating
and storage conditions. However, in applications where
the standard V
TRIP
is not exactly right, or for higher preci-
sion in the V
TRIP
value, the X5643/X5645 threshold may
be adjusted.
TRIP
)
Setting the V
This procedure sets the V
For example, if the current V
V
TRIP
is 4.6V, this procedure directly makes the change. If
the new setting is lower than the current setting, then it is
necessary to reset the trip point before setting the new
value.
TRIP
Voltage
TRIP
to a higher voltage value.
TRIP
is 4.4V and the new
To set the new V
threshold to the Vcc pin and tie the CS/WDI pin and the
WP pin HIGH. RESET/RESET and SO pins are left
unconnected. Then apply the programming voltage Vp to
both SCK and SI and pulse CS/WDI LOW then HIGH.
Remove Vp and the sequence is complete.
TRIP
voltage, apply the desired V
TRIP
Figure 1. Set V
TRIP
Voltage
Resetting the V
This procedure sets the V
For example, if the current V
reset, the new V
procedure must be used to set the voltage to a lower
value.
TRIP
Voltage
TRIP
TRIP
to a “native” voltage level.
is 4.4V and the V
is something less than 1.7V. This
TRIP
is
TRIP
To reset the V
and 5.5V to the Vcc pin. Tie the CS/WDI pin, the WP pin,
and the SCK pin HIGH. RESET/RESET and SO pins are
left unconnected. Then apply the programming voltage Vp
to the SI pin ONLY and pulse CS/WDI LOW then HIGH.
Remove Vp and the sequence is complete.
TRIP
voltage, apply a voltage between 2.7
Figure 2. Reset V
TRIP
Voltage
SCK
SI
Vp
Vp
CS
SCK
SI
Vcc
Vp
CS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X5643 | RTC Module With CPU Supervisor |
| X5645 | RTC Module With CPU Supervisor |
| X5648S8-2.7A | SPI Serial EEPROM with Supervisory Features |
| X5648S8I-4.5A | SPI Serial EEPROM with Supervisory Features |
| X5648V14 | Industrial Control IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X5643P | 功能描述:IC CPU SUPRV 64K EE RST LO 8DIP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時:標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
| X5643P-4.5A | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:CPU Supervisor with 64Kbit SPI EEPROM |
| X5643S14 | 功能描述:IC CPU SUPRV 64K EE RST LO SO14 RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時:標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
| X5643S14-1.8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SPI Serial EEPROM with Supervisory Features |
| X5643S14-2.7 | 功能描述:IC CPU SUPRV 64K EE RST LO SO14 RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類型:簡單復(fù)位/加電復(fù)位 監(jiān)視電壓數(shù)目:1 輸出:開路漏極或開路集電極 復(fù)位:低有效 復(fù)位超時:標(biāo)準(zhǔn)傳輸延遲為 60 µs 電壓 - 閥值:3V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應(yīng)商設(shè)備封裝:SOT-23-5 包裝:Digi-Reel® 其它名稱:LM8364BALMF30DKR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。