X1228
Figure 5. Set V
RESET
Level Sequence (V = desired V value)
TRIP
TRIP
CC
V
= 15V
P
V
CC
V
CC
0
1
2
3
4
5 6 7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5 6 7
SCL
SDA
AEh
00h
01h
00h
Note: BP0, BP1, BP2 must be disabled.
Resetting the V
Voltage
to 10 milliseconds to complete and also writes 00h to
address 03h of the EEPROM array.
TRIP
This procedure is used to set the V
to a “native”
TRIP
voltage level. For example, if the current V
is 4.4V
TRIP
For best accuracy in setting V
following sequence be used.
, it is advised that the
TRIP
and the new V
must be 4.0V, then the V
must
TRIP
TRIP
be reset. When V
is reset, the new V
is some-
TRIP
TRIP
1.Program V
as above.
thing less than 1.7V. This procedure must be used to
set the voltage to a lower value.
TRIP
2.Measure resulting V
by measuring the V
CC
TRIP
value where a RESET occurs. Calculate Delta =
(Desired – Measured) V value.
To reset the new V
voltage, apply more than 5.5V
TRIP
TRIP
to the V
pin and tie the RESET pin to the
CC
programming voltage V . Then write 00h to address
3.Perform a V
program using the following formula
P
TRIP
03h. The stop bit of a valid write operation initiates the
to set the voltage of the RESET pin:
V
programming sequence. Bring RESET to V
to
TRIP
CC
V
= (Desired Value – Delta) + 0.025V
RESET
complete the operation. Note: this operation takes up
Figure 6. Reset V
Level Sequence
TRIP
V
= 15V
P
RESET
V
V
CC
CC
0
1 2 3 4 5 6 7
0
1
2 3
4
5 6
7
0
1
2 3
4
5 6
7
0
1
2 3
4
5 6 7
SCL
SDA
AEh
00h
03h
00h
Note: BP0, BP1, BP2 must be disabled.
Characteristics subject to change without notice. 17 of 31
REV 1.3 3/24/04
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