x5043s8c1038 Intersil Corporation, x5043s8c1038 Datasheet - Page 6

• Manufacturer Part Number: x5043s8c1038
• Description: Cpu Supervisor With 4k Spi Eeprom
• Manufacturer: Intersil Corporation

no microprocessor action, the watchdog timer control bits
remain unchanged, even during total power failure.
V
The X5043, X5045 are shipped with a standard V
threshold (V
normal operating and storage conditions. However, in
applications where the standard V
if higher precision is needed in the V
X5045 threshold may be adjusted. The procedure is
described below, and uses the application of a high voltage
control signal.
Setting the V
This procedure is used to set the V
value. For example, if the current V
V
the new setting is to be lower than the current setting, then it
is necessary to reset the trip point before setting the new
value.
To set the new V
threshold voltage to the V
programming voltage V
followed by a write of Data 00h to address 01h. CS going
HIGH on the write operation initiates the V
sequence. Bring WP LOW to complete the operation.
Note: This operation also writes 00h to array address 01h.
Resetting the V
This procedure is used to set the V
level. For example, if the current V
V
V
This procedure must be used to set the voltage to a lower
value.
To reset the V
and tie the WP pin to the programming voltage V
send a WREN command, followed by a write of Data 00h to
TRIP
TRIP
TRIP
CC
SCK
WP
Threshold Reset Procedure
CS
is 4.6V, this procedure will directly make the change. If
must be 4.0V, then the V
is reset, the new V
SI
TRIP
TRIP
TRIP
) voltage. This value will not change over
TRIP
TRIP
0 1 2 3 4 5 6 7
voltage, apply at least 3V to the V
Voltage
voltage, apply the desired V
P
Voltage
. Then send a WREN command,
TRIP
CC
WREN
06h
pin and tie the WP pin to the
is something less than 1.7V.
6
FIGURE 1. SET V
TRIP
TRIP
TRIP
TRIP
TRIP
TRIP
must be reset. When
TRIP
is not exactly right, or
is 4.4V and the new
to a higher voltage
to a “native” voltage
is 4.4V and the new
value, the X5043,
TRIP
programming
TRIP
P
TRIP
CC
. Then
0 1 2 3 4 5 6 7 8 9 10
LEVEL SEQUENCE (V
CC
X5043, X5045
pin
V
Write
P
02h
= 15-18V
address 03h. CS going HIGH on the write operation initiates
the V
complete the operation.
Note: This operation also writes 00h to array address 03h.
CC
TRIP
= DESIRED V
programming sequence. Bring WP LOW to
11
8 Bits
Address
01h
12 13 14 15
TRIP
VALUE.)
Data
00h
March 16, 2006
FN8126.2