ISL12022MIBZ-T Intersil, ISL12022MIBZ-T Datasheet - Page 22

• Manufacturer Part Number: ISL12022MIBZ-T
• Description: IC RTC/CALENDAR TEMP SENS 20SOIC
• Manufacturer: Intersil
• Type: Clock/Calendarr

Specifications of ISL12022MIBZ-T

• Memory Size: 128B
• 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: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ISL12022MIBZ-TCT

DST Control Registers (DSTCR)
8 bytes of control registers have been assigned for the
Daylight Savings Time (DST) functions. DST beginning
(set Forward) time is controlled by the registers
DstMoFd, DstDwFd, DstDtFd, and DstHrFd. DST ending
time (set Backward or Reverse) is controlled by DstMoRv,
DstDwRv, DstDtRv and DstHrRv.
Tables 20 and 21 describe the structure and functions of
the DSTCR.
DST FORWARD REGISTERS (20H TO 23H)
DST forward is controlled by the following DST Registers:
DST Enable
DSTE is the DST Enabling Bit located in bit 7 of register
20h (DstMoFdxx). Set DSTE = 1 will enable the DSTE
function. Upon powering up for the first time (including
battery), the DSTE bit defaults to “0”. When DSTE is set
to “1” the RTC time must be at least one hour before the
scheduled DST time change for the correction to take
place. When DSTE is set to “0”, the DSTADJ bit in the
Status Register automatically resets to “0”.
DST Month Forward
DstMoFd sets the Month that DST starts. The format is
the same as for the RTC register month, from 1 to 12.
The default value for the DST begin month is 00h.
DST Day/Week Forward
DstDwFd contains both the Day of the Week and the
Week of the Month data for DST Forward control. DST
can be controlled either by actual date or by setting both
the Week of the month and the Day of the Week.
DstDwFdE sets the priority of the Day/Week over the
Date. For DstDwFdE = 1, Day/Week is the priority. You
ADDRESS
ADDRESS
24h
25h
26h
27h
20h
21h
22h
23h
Hour Reverse
Date Reverse
Day Reverse
Day Forward
FUNCTION
Reverse
Forward
Forward
Forward
Month
NAME
Month
Hour
Date
22
DSTE
7
0
0
0
0
7
0
0
0
TABLE 20. DST FORWARD REGISTERS
TABLE 21. DST REVERSE REGISTERS
DwFdE
DwRvE
6
0
0
0
6
0
0
0
ISL12022M
WkFd12
DtFd21
HrFd21
WkRv12
DtRv21
HrRv21
5
0
5
0
must have the correct Day of Week entered in the RTC
registers for the Day/Week correction to work properly.
• Bits 0, 1, 2 contain the Day of the week information
• Bits 3, 4, 5 contain the Week of the Month information
DST Date Forward
DstDtfd controls which Date DST begins. The format for
the Date is the same as for the RTC register, from 1 to
31. The default value for DST forward date is 00h.
DstDtFd is only effective if DstDwFdE = 0.
DST Hour Forward
DstHrFd controls the hour that DST begins. The RTC hour
and DstHrFd registers have the same formats except
there is no Military bit for DST hour. The user sets the
DST hour with the same format as used for the RTC hour
(AM/PM or MIL) but without the MIL bit, and the DST will
still advance as if the MIL bit were there. The default
value for DST hour Forward is 00h.
DST REVERSE REGISTERS (24H TO 27H)
DST end (reverse) is controlled by the following DST
Registers:
DST Month Reverse
DstMoRv sets the Month that DST ends. The format is
the same as for the RTC register month, from 1 to 12.
The default value for the DST end month is October
(10h).
WkFd11
MoFd20
which sets the Day of the Week that DST starts. Note
that Day of the week counts from 0 to 6, like the RTC
registers. The default for the DST Forward Day of the
Week is 00h (normally Sunday).
that sets the week that DST starts. The range is from
1 to 5, and Week 7 is used to indicate the last week of
the month. The default for the DST Forward Week of
the Month is 00h.
WkRv11
DtFd20
HrFd20
MoRv20
HrRv20
DtRv20
4
4
WkFd10
WkRv10
MoFd13
MoRv13
HrRv13
DtFd13
HrFd13
DtRv13
3
3
DwRv12
DwFd12
MoRv12
MoFd12
HrRv12
DtRv12
DtFd12
HrFd12
2
2
DwRv11
MoRv11
DwFd11
DtRv11
HrRv11
MoFd11
DtFd11
HrFd11
1
1
DwRv10
June 4, 2010
DwFd10
MoRv10
MoFd10
DtRv10
HrRv10
DtFd10
HrFd10
FN6668.7
0
0