X5043 XICOR [Xicor Inc.], X5043 Datasheet - Page 4

• Manufacturer Part Number: X5043
• Description: CPU Supervisor with 4K SPI EEPROM
• Manufacturer: XICOR [Xicor Inc.]

X5043/X5045
Resetting the V
This procedure is used to set the V
voltage level. For example, if the current V
and the new V
be reset. When V
thing less than 1.7V. This procedure must be used to
set the voltage to a lower value.
Figure 2. Reset V
Figure 3. Sample V
REV 1.1.2 5/29/01
SCK
V
WP
CS
Adj.
TRIP
SI
TRIP
0 1 2 3 4 5 6 7
TRIP
TRIP
TRIP
must be 4.0V, then the V
TRIP
Voltage
is reset, the new V
WREN
Level Sequence (V
06h
Reset Circuit
V
P
Adjust
Run
TRIP
TRIP
to a “native”
TRIP
CC
TRIP
0 1 2 3 4 5 6 7 8 9 10
is some-
> 3V. WP = 15–18V)
is 4.4V
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must
V
Write
PE
1
2
3
4
02h
= 15-18V
X5043
X5045
To reset the V
pin and tie the WP pin to the programming voltage V
Then send a WREN command, followed by a write of
Data 00h to address 03h. CS going HIGH on the write
operation initiates the V
Bring WP LOW to complete the operation.
Note: This operation also writes 00h to array address
03h.
8
7
6
5
11
8 Bits
Address
TRIP
03h
12 13 14 15
4.7K
Characteristics subject to change without notice.
voltage, apply at least 3V to the V
RESET
TRIP
programming sequence.
Data
00h
SCK
SI
SO
CS
µC
4 of 20
CC
P
.