X4283 INTERSIL [Intersil Corporation], X4283 Datasheet - Page 4

• Manufacturer Part Number: X4283
• Description: CPU Supervisor with 128K EEPROM
• Manufacturer: INTERSIL [Intersil Corporation]

Setting the V
This procedure is used to set the V
lower voltage value. It is necessary to reset the trip
point before setting the new value.
To set the new V
bit in the control register, then apply the desired V
threshold voltage to the V
voltage, V
byte of “00” data. The stop bit following a valid write
operation initiates the V
Bring WP LOW to complete the operation.
Figure 2. Reset V
Figure 3. Sample V
SCL
SDA
WP
V
Adj.
TRIP
P
, to the WP pin and 2 byte address and 1
0 1 2 3 4 5 6 7
TRIP
TRIP
TRIP
Voltage
A0h
TRIP
voltage, start by setting the WEL
Level Sequence (V
RESET
TRIP
Reset Circuit
CC
4
pin and the programming
programming sequence.
4.7K
0 1 2 3 4 5 6 7
TRIP
to a higher or
V
P
CC
= 12-15V
00h
> 3V. WP = 12-15V, WEL bit set)
1
2
3
4
X4283, X4285
TRIP
X4283
SOIC
0 1 2 3 4 5 6 7
8
7
6
5
Resetting the V
This procedure is used to set the V
voltage level. For example, if the current V
and the new V
be reset. When V
thing less than 1.7V. This procedure must be used to
set the voltage to a lower value.
To reset the new V
WEL bit in the control register, apply V
gramming voltage, V
address and 1 byte of “00” data. The stop bit of a valid
write operation initiates the V
sequence. Bring WP LOW to complete the operation.
03h
Adjust
Run
TRIP
TRIP
0 1 2 3 4 5 6 7
TRIP
V
P
must be 4.0V, then the V
TRIP
Voltage
P
is reset, the new V
00h
, to the WP pin and 2 byte
voltage start by setting the
SCL
SDA
TRIP
TRIP
CC
µC
TRIP
programming
to a “native”
and the pro-
TRIP
March 29, 2005
TRIP
is some-
is 4.4V
FN8121.0
must