X40626
To set the new V
TRIP
voltage, start by setting the WEL
bit in the control register, then apply the desired V
TRIP
threshold voltage to the V
CC
pin and the programming
voltage, V
P
, to the WP pin and 2 byte address and 1
byte of 鈥?0鈥?data. The stop bit following a valid write
operation initiates the V
TRIP
programming sequence.
Bring WP LOW to complete the operation.
Resetting the V
TRIP
Voltage
This procedure is used to set the V
TRIP
to a 鈥渘ative鈥?/div>
voltage level. For example, if the current V
TRIP
is 4.4V
and the new V
TRIP
must be 4.0V, then the V
TRIP
must
be reset. When V
TRIP
is reset, the new V
TRIP
is some-
thing less than 1.7V. This procedure must be used to
set the voltage to a lower value.
To reset the new V
TRIP
voltage start by setting the WEL
bit in the control register, apply the desired V
TRIP
threshold voltage to the V
CC
pin and the programming
voltage, V
P
, to the WP pin and 2 byte address and 1
byte of 鈥?0鈥?data. The stop bit of a valid write operation
initiates the V
TRIP
programming sequence. Bring WP
LOW to complete the operation.
Figure 2. Reset V
TRIP
Level Sequence (V
CC
/V
2MON
> 3V, WP = 12-15V, WEL bit set)
WP
V
P
= 12-15V
0 1 2 3 4 5 6 7
SCL
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
SDA
A0H
00H
xxH*
*for V
TRIP2
address is 0FH
for V
TRIP
address is 03H
00H
Figure 3. Sample V
TRIP
Reset Circuit
V
P
1
4.7K
RESET
V
TRIP
Adj.
2
12
3
4
X40626
5
6
9
7
8
14
13
Adjust
碌C
Run
SCL
SDA
REV 1.1.15 2/11/04
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Characteristics subject to change without notice.
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