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X4323V8 Datasheet(PDF) 4 Page - Intersil Corporation

Part # X4323V8
Description  CPU Supervisor with 32K EEPROM
Download  21 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

X4323V8 Datasheet(HTML) 4 Page - Intersil Corporation

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4
FN8122.0
March 29, 2005
Setting the VTRIP Voltage
This procedure is used to set the VTRIP to a higher or
lower voltage value. It is necessary to reset the trip
point before setting the new value.
To set the new VTRIP voltage, start by setting the WEL
bit in the control register, then apply the desired VTRIP
threshold voltage to the VCC pin and the programming
voltage, VP, to the WP pin and 2-byte address and 1
byte of “00” data. The stop bit following a valid write
operation initiates the VTRIP programming sequence.
Bring WP LOW to complete the operation.
Resetting the VTRIP Voltage
This procedure is used to set the VTRIP to a “native”
voltage level. For example, if the current VTRIP is 4.4V
and the new VTRIP must be 4.0V, then the VTRIP must
be reset. When VTRIP is reset, the new VTRIP is some-
thing less than 1.7V. This procedure must be used to
set the voltage to a lower value.
To reset the new VTRIP voltage start by setting the
WEL bit in the control register, apply the desired VTRIP
threshold voltage to the VCC pin and the programming
voltage, VP, to the WP pin and 2-byte address and 1
byte of “00” data. The stop bit of a valid write operation
initiates the VTRIP programming sequence. Bring WP
LOW to complete the operation.
Figure 2. Reset VTRIP Level Sequence (VCC > 3V. WP = 12-15V, WEL bit set)
Figure 3. Sample VTRIP Reset Circuit
01 2 3 45 67
SCL
SDA
A0h
01 2 3 45 67
00h
WP
VP = 12-15V
01 2 3 45 67
03h
01 2 3 4 5 6 7
00h
1
2
3
4
8
7
6
5
X4323
VTRIP
Adj.
VP
RESET
4.7K
SDA
SCL
µC
Adjust
Run
SOIC
X4323, X4325


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