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參數(shù)資料
| 型號： | X40034V14-B |
| 廠商： | INTERSIL CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Triple Voltage Monitor with Integrated CPU Supervisor |
| 中文描述： | 3-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14 |
| 封裝： | 4.40 MM, PLASTIC, MO-153AC, TSSOP-14 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大?。?/td> | 360K |
| 代理商： | X40034V14-B |
8
FN8114.1
May 25, 2006
WATCHDOG TIMER
The Watchdog Timer circuit monitors the microproces-
sor activity by monitoring the SDA and SCL pins. A
standard read or write sequence to any slave address
byte restarts the watchdog timer and prevents the
WDO signal going active. A minimum sequence to
reset the watchdog timer requires four microprocessor
instructions namely, a Start, Clock Low, Clock High
and Stop. The state of two nonvolatile control bits in
the Status Register determine the watchdog timer
period. The microprocessor can change these watch-
dog bits by writing to the X40030, X40031, X40034,
X40035 control register (also refer to page 21).
Figure 4. Watchdog Restart
V1, V2 AND V3 THRESHOLD PROGRAM
PROCEDURE (OPTIONAL)
The X40030 is shipped with standard V1, V2 and V3
threshold (V
TRIP1,
V
TRIP2,
V
TRIP3
) voltages. These
values will not change over normal operating and stor-
age conditions. However, in applications where the
standard thresholds are not exactly right, or if higher
precision is needed in the threshold value, the X40030,
X40031, X40034, X40035 trip points may be adjusted.
The procedure is described below, and uses the appli-
cation of a high voltage control signal.
Setting a V
TRIPx
Voltage (x=1, 2, 3)
There are two procedures used to set the threshold
voltages (V
TRIPx
), depending if the threshold voltage to
be stored is higher or lower than the present value. For
example, if the present V
TRIPx
is 2.9 V and the new
V
TRIPx
is 3.2 V, the new voltage can be stored directly
into the V
TRIPx
cell. If however, the new setting is to be
lower than the present setting, then it is necessary to
“reset” the V
TRIPx
voltage before setting the new value.
Setting a Higher V
TRIPx
Voltage (x=1, 2, 3)
To set a V
TRIPx
threshold to a new voltage which is
higher than the present threshold, the user must apply
the desired V
TRIPx
threshold voltage to the corre-
sponding input pin (Vcc(V1MON), V2MON or V3MON).
Then, a programming voltage (Vp) must be applied to
the WDO pin before a START condition is set up on
SDA. Next, issue on the SDA pin the Slave Address
A0h, followed by the Byte Address 01h for V
TRIP1
, 09h
for V
TRIP2
, and 0Dh for V
TRIP3
, and a 00h Data Byte in
order to program V
TRIPx
. The STOP bit following a valid
write operation initiates the programming sequence. Pin
WDO must then be brought LOW to complete the oper-
ation. To check if the V
TRIPX
has been set, set VXMON
to a value slightly greater than V
TRIPX
(that was previ-
ously set). Slowly ramp down VXMON and observe
when the corresponding outputs (LOWLINE, V2FAIL
and V3FAIL) switch. The voltage at which this occurs is
the V
TRIPX
(actual).
C
ASE
A
Now if the desired V
TRIPX
is greater than the V
TRIPX
(actual), then add the difference between V
TRIPX
(desired) – V
TRIPX
(actual) to the original V
TRIPX
desired. This is your new V
TRIPX
that should be
applied to VXMON and the whole sequence should be
repeated again (see Figure 5).
C
ASE
B
Now if the V
TRIPX
(actual), is higher than the V
TRIPX
(desired), perform the reset sequence as described in
the next section. The new V
TRIPX
voltage to be applied
to VXMON will now be: V
TRIPX
(desired) – (V
TRIPX
(actual) – V
TRIPX
(desired)).
Note:
This operation does not corrupt the memory array.
Setting a Lower V
TRIPx
Voltage (x=1, 2, 3)
In order to set V
TRIPx
to a lower voltage than the
present value, then V
TRIPx
must first be “reset” accord-
ing to the procedure described below. Once V
TRIPx
has been “reset”, then V
TRIPx
can be set to the desired
voltage using the procedure described in “Setting a
Higher V
TRIPx
Voltage”.
Resetting the V
TRIPx
Voltage
To reset a V
TRIPx
voltage, apply the programming volt-
age (Vp) to the WDO pin before a START condition is
set up on SDA. Next, issue on the SDA pin the Slave
Address A0h followed by the Byte Address 03h for
V
TRIP1
, 0Bh for V
TRIP2
, and 0Fh for V
TRIP3
, followed
by 00h for the Data Byte in order to reset V
TRIPx
. The
STOP bit following a valid write operation initiates the
programming sequence. Pin WDO must then be
brought LOW to complete the operation.
After being reset, the value of V
TRIPx
becomes a nomi-
nal value of 1.7V or lesser.
Notes:
1.This operation does not corrupt the memory
array.
2. Set V
CC
1.5(V2MON or V3MON), when
setting V
TRIP2
or V
TRIP3
respectively
SCL
SDA
.6μs
1.3μs
WDT Reset
Start
Stop
X40030, X40031, X40034, X40035
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| X40034V14-C | Triple Voltage Monitor with Integrated CPU Supervisor |
| X40034V14I-A | Triple Voltage Monitor with Integrated CPU Supervisor |
| X40034V14I-B | Triple Voltage Monitor with Integrated CPU Supervisor |
| X40034V14I-C | Triple Voltage Monitor with Integrated CPU Supervisor |
| X40034V14IZ-A | Triple Voltage Monitor with Integrated CPU Supervisor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X40034V14-BT1 | 功能描述:IC VOLTAGE MONITOR TRPL 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:100 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:- 復位:低有效 復位超時:最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:8-TSSOP 包裝:管件 |
| X40034V14-C | 功能描述:IC VOLTAGE MONITOR TRPL 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:100 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:- 復位:低有效 復位超時:最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:8-TSSOP 包裝:管件 |
| X40034V14-CT1 | 功能描述:IC VOLTAGE MONITOR TRPL 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:100 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:- 復位:低有效 復位超時:最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:8-TSSOP 包裝:管件 |
| X40034V14I-A | 功能描述:IC VOLTAGE MONITOR TRPL 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:100 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:- 復位:低有效 復位超時:最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:8-TSSOP 包裝:管件 |
| X40034V14I-AT1 | 功能描述:IC VOLTAGE MONITOR TRPL 14-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 監(jiān)控器 系列:- 標準包裝:100 系列:- 類型:簡單復位/加電復位 監(jiān)視電壓數(shù)目:1 輸出:- 復位:低有效 復位超時:最小為 100 ms 電壓 - 閥值:4.38V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應商設(shè)備封裝:8-TSSOP 包裝:管件 |
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