X40434 INTERSIL [Intersil Corporation], X40434 Datasheet - Page 10

• Manufacturer Part Number: X40434
• Description: Triple Voltage Monitor with Integrated CPU Supervisor
• Manufacturer: INTERSIL [Intersil Corporation]

Figure 5. Sample V
Figure 6. V
WEL: Write Enable Latch (Volatile)
The WEL bit controls the access to the memory and to
the Register during a write operation. This bit is a vola-
tile latch that powers up in the LOW (disabled) state.
While the WEL bit is LOW, writes to any address,
V
Adj.
TRIP1
Old V
TRIPX
New V
X
applied + | Error |
Set/Reset Sequence (X = 1, 2, 3)
X
TRIP
applied =
V
Adj.
TRIP2
Error < MDE
V2FAIL
Reset Circuit
10
NO
–
RESET
No
X40430, X40431, X40434, X40435
V
Set Higher V
Set V
Apply V
> Desired V
TRIPX
V
TRIPX
Output Switches?
Desired V
Actual V
Present Value
X
Decrease V
Reset Sequence
= desired V
V
Desired
Execute
Execute
CC
DONE
Programming
TRIPX
1
6
2
7
and Voltage
TRIPX
X
TRIPX -
| Error | < | MDE |
TRIPX
X4043X
<
Sequence
YES
YES
to V
X
TRIPX
X
13
including any control registers will be ignored (no
acknowledge will be issued after the Data Byte). The
WEL bit is set by writing a “1” to the WEL bit and
zeroes to the other bits of the control register.
14
9
8
Error > MDE
Old V
Execute Reset V
New V
Adjust
X
Run
Sequence
applied - | Error |
+
Let: MDE = Maximum Desired Error
Vx = V
Note: X = 1, 2, 3
X
applied =
Desired Value
V
P
CC
TRIPX
, VxMON
MDE
MDE
Error = Actual - Desired
+
–
SCL
SDA
µC
Error Range
Acceptable
May 24, 2006
FN8251.1