x9522v20iz-bt1 Intersil Corporation, x9522v20iz-bt1 Datasheet - Page 13

• Manufacturer Part Number: x9522v20iz-bt1
• Description: Triple Dcp, Dual Voltage Monitors
• Manufacturer: Intersil Corporation

V3 monitoring
The X9522 asserts the V3RO output HIGH if the volt-
age V3 exceeds the corresponding V
(See Figure 14). The bit V3OS in the CONSTAT regis-
ter is then set to a “0” (assuming that it has been set to
“1” after system initilization).
The V3RO output may remain active HIGH with Vcc
down to 1V.
V
The X9522 is shipped with pre-programmed threshold
(V
thresholds are different from the default values, or if a
TRIPX
V2, V3
TRIPx
WP
SCL
WP
SDA
SCL
SDA
) voltages. In applications where the required
THRESHOLDS (X = 2,3)
S
A
R
T
T
R
S
T
A
T
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
13
A0h
A0h
Figure 15. Setting V
†
†
Figure 16. Resetting the V
V
TRIPx
TRIP3
0 1 2 3 4 5 6 7
threshold
0 1 2 3 4 5 6 7
0Bh
0Fh
09h
0Dh
†
†
V
†
†
Resets VTRIP3
Resets VTRIP2
TRIPx
P
sets V
sets V
X9522
V
P
to a higher level (x = 1,2).
TRIP1
TRIP2
TRIPx
higher precision / tolerance is required, the X9522 trip
points may be adjusted by the user, using the steps
detailed below.
Setting a V
There are two procedures used to set the threshold
voltages (V
to be stored is higher or lower than the present value.
For example, if the present V
new V
directly into the V
is to be lower than the present setting, then it is neces-
sary to “reset” the V
new value.
Level (x = 2,3)
TRIPx
0 1 2 3 4 5 6 7
Data Byte
0 1 2 3 4 5 6 7
00h
TRIPx
is 3.2 V, the new voltage can be stored
Data Byte
TRIPx
†
00h
), depending if the threshold voltage
TRIPx
Voltage (x = 2,3)
TRIPx
cell. If however, the new setting
†
†
voltage before setting the
All others Reserved.
†
TRIPx
All others Reserved.
is 2.9 V and the
January 3, 2006
FN8208.1