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X40034S14-C Datasheet(PDF) 10 Page - Intersil Corporation

Part # X40034S14-C
Description  Triple Voltage Monitor with Integrated CPU Supervisor
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X40034S14-C Datasheet(HTML) 10 Page - Intersil Corporation

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10
FN8114.1
May 25, 2006
Figure 6. VTRIPX Set/Reset Sequence (X = 1, 2, 3)
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,
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.
Once set, WEL remains set until either it is reset to 0
(by writing a “0” to the WEL bit and zeroes to the other
bits of the control register) or until the part powers up
again. Writes to the WEL bit do not cause a high volt-
age write cycle, so the device is ready for the next
operation immediately after the stop condition.
PUP1, PUP0: Power Up Bits (Nonvolatile)
The Power Up bits, PUP1 and PUP0, determine the
tPURST time delay. The nominal power up times are
shown in the following table.
VTRIPX Programming
Apply VCC and Voltage
Decrease VX
Actual VTRIPX -
Desired VTRIPX
DONE
Set Higher VX Sequence
Error < MDE
| Error | < | MDE |
YES
NO
Error > MDE+
> Desired VTRIPX to VX
Desired
Present Value
VTRIPX<
Execute
No
YES
Execute
VTRIPX Reset Sequence
Set VX = desired VTRIPX
New VX applied =
Old VX applied + | Error |
New VX applied =
Old VX applied - | Error |
Execute Reset VTRIPX
Sequence
Output Switches?
Note: X = 1, 2, 3
Let: MDE = Maximum Desired Error
Vx = VCC, VxMON
MDE+
Desired Value
MDE
Acceptable
Error Range
Error = Actual - Desired
PUP1 PUP0
Power on Reset Delay (tPURST)
0
0
50ms
0
1
200ms (factory setting)
1
0
400ms
1
1
800ms
X40030, X40031, X40034, X40035


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