X1228S14 Intersil, X1228S14 Datasheet - Page 17

• Manufacturer Part Number: X1228S14
• Description: IC RTC CPU SUP WDT 4K EE 14-SOIC
• Manufacturer: Intersil
• Type: Clock/Calendar/EEPROMr

Specifications of X1228S14

• Memory Size: 4K (512 x 8)
• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Figure 5. Set V
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.
To reset the new V
to the V
programming voltage V
03h. The stop bit of a valid write operation initiates the
V
complete the operation. Note: this operation takes up
Figure 6. Reset V
RESET
Note: BP0, BP1, BP2 must be disabled.
RESET
TRIP
Note: BP0, BP1, BP2 must be disabled.
V
SDA
SCL
SDA
V
CC
SCL
CC
programming sequence. Bring RESET to V
CC
pin and tie the RESET pin to the
TRIP
TRIP
0 1 2 3 4 5 6 7
TRIP
0 1 2 3 4 5 6 7
TRIP
TRIP
TRIP
must be 4.0V, then the V
Level Sequence (V
Voltage
is reset, the new V
Level Sequence
voltage, apply more than 5.5V
P
. Then write 00h to address
AEh
17
AEh
TRIP
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
CC
TRIP
to a “native”
TRIP
= desired V
TRIP
is some-
00h
is 4.4V
00h
V
CC
must
P
V
= 15V
to
P
= 15V
X1228
TRIP
value)
to 10 milliseconds to complete and also writes 00h to
address 03h of the EEPROM array.
For best accuracy in setting V
the following sequence be used.
1.Program V
2.Measure resulting V
3.Perform a V
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
value where a RESET occurs. Calculate Delta =
(Desired – Measured) V
to set the voltage of the RESET pin:
V
RESET
01h
= (Desired Value – Delta) + 0.025V
03h
TRIP
TRIP
as above.
program using the following formula
TRIP
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
TRIP
by measuring the V
value.
TRIP
00h
00h
, it is advised that
May 18, 2006
CC
V
V
CC
FN8100.4
CC