X9522_06 Datasheet, PDF (13/27 Pages) Intersil Corporation – Triple DCP, Dual Voltage Monitors

X9522
V2, V3
V_TRIPx
V_P
WP
SCL
0 1 23 4 56 7
0 1 23 4 56 7
0 1 23 4 56 7
SDA
S
T
A
R
T
00h
A0h ^†
09h^†
0Dh^†
sets
sets
V_TRIP1
V_TRIP2
Data Byte ^†
Figure 15. Setting V_TRIPx to a higher level (x = 1,2).
† _{All others Reserved.}
V3 monitoring
The X9522 asserts the V3RO output HIGH if the volt-
age V3 exceeds the corresponding V_TRIP3 threshold
(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_TRIPX THRESHOLDS (X = 2,3)
The X9522 is shipped with pre-programmed threshold
(V_TRIPx) voltages. In applications where the required
thresholds are different from the default values, or if a
higher precision / tolerance is required, the X9522 trip
points may be adjusted by the user, using the steps
detailed below.
Setting a V_TRIPx Voltage (x = 2,3)
There are two procedures used to set the threshold
voltages (V_TRIPx), depending if the threshold voltage
to be stored is higher or lower than the present value.
For example, if the present V_TRIPx is 2.9 V and the
new V_TRIPx is 3.2 V, the new voltage can be stored
directly into the V_TRIPx cell. If however, the new setting
is to be lower than the present setting, then it is neces-
sary to “reset” the V_TRIPx voltage before setting the
new value.
WP
SCL
SDA
V_P
0 1 23 4 56 7
0 1 23 4 56 7
0 1 23 4 56 7
00h ^†
A0h^†
S
T
A
R
0Bh^† Resets VTRIP2
0Fh^† Resets VTRIP3
Data Byte
T
† _{All others Reserved.}
Figure 16. Resetting the V_TRIPx Level (x = 2,3)
13
FN8208.1
January 3, 2006