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參數(shù)資料
| 型號(hào)： | 40430C |
| 英文描述： | 4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor |
| 中文描述： | 4kbit的EEPROM，三電壓監(jiān)視器集成CPU監(jiān)控 |
| 文件頁(yè)數(shù)： | 6/24頁(yè) |
| 文件大?。?/td> | 421K |
| 代理商： | 40430C |
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X40430/X40431 – Preliminary Information
Characteristics subject to change without notice.
6 of 24
REV 1.2.3 11/28/00
www.xicor.com
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.
Note:
This operation does not corrupt the memory
array.
Control Register
The Control Register provides the user a mechanism
for changing the Block Lock and Watchdog Timer set-
tings. The Block Lock and Watchdog Timer bits are
nonvolatile and do not change when power is removed.
The Control Register is accessed with a special pre-
amble in the slave byte (1011) and is located at
address 1FFh. It can only be modified by performing a
byte write operation directly to the address of the regis-
ter and only one data byte is allowed for each register
write operation. Prior to writing to the Control Register,
the WEL and RWEL bits must be set using a two step
process, with the whole sequence requiring 3 steps.
See "Writing to the Control Registers" on page 7.
The user must issue a stop, after sending this byte to
the register, to initiate the nonvolatile cycle that stores
WD1, WD0, PUP1, PUP0, BP1, and BP0. The X40430
will not acknowledge any data bytes written after the
first byte is entered.
The state of the Control Register can be read at any
time by performing a random read at address 1FFh,
using the special preamble. Only one byte is read by
each register read operation. The master should
supply a stop condition to be consistent with the bus
protocol.
RWEL: Register Write Enable Latch (Volatile)
The RWEL bit must be set to “1” prior to a write to the
Control Register.
7
6
5
4
3
2
1
0
PUP1 WD1
WD0
BP1
BP0
RWEL WEL PUP0
Figure 5. Sample V
TRIP
Reset Circuit
1
6
2
7
14
13
9
8
X40430
V
TRIP1
Adj.
V
P
SDA
SCL
μC
Adjust
Run
V2FAIL
V
TRIP2
Adj.
RESET
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 40430X | 4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor |
| 40430A | 4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor |
| 40430B | 4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor |
| 4043B | Quadruple R/S latch with 3-state outputs |
| 4044-UCA | 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 40430X | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor |
| 404310 | 制造商:MAGNUM / COOPER 功能描述: |
| 40431-0010 | 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:MS4800-ADPT-TXS |
| 40431-0020 | 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:MS4800-ADPT-TXM |
| 40431-0030 | 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:MS4800-ADPT-RX |
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