參數(shù)資料
型號(hào)： ISL12028AIB27Z-T
廠商： INTERSIL CORP
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： REAL TIME CLOCK, PDSO14
封裝： ROHS COMPLIANT, PLASTIC, MS-012AB, SOIC-14
文件頁(yè)數(shù)： 4/29頁(yè)
文件大小： 579K
代理商： ISL12028AIB27Z-T
12
FN8233.8
August 9, 2010
Unused Bits
Bit 3 in the SR is not used, but must be zero. The Data Byte
output during a SR read will contain a zero in this bit
location.
Alarm Registers (Non-Volatile)
Alarm0 and Alarm1
The alarm register bytes are set up identical to the RTC
register bytes, except that the MSB of each byte functions as
an enable bit (enable = “1”). These enable bits specify which
alarm registers (seconds, minutes, etc.) are used to make
the comparison. Note that there is no alarm byte for year.
The alarm function works as a comparison between the
alarm registers and the RTC registers. As the RTC
advances, the alarm will be triggered once a match occurs
between the alarm registers and the RTC registers. Any one
alarm register, multiple registers, or all registers can be
enabled for a match. See “Device Operation” on page 14
and “Application Section” on page 22 for more information.
TABLE 2. CLOCK/CONTROL MEMORY MAP
ADDR.
TYPE
REG
NAME
BIT
RANG
E
ISL12
028
DEF
AUL
T
ISL1202
8
A
DEF
AUL
T
7
6
5
4
3
2
1
0
003F
Status
SR
BAT
AL1
AL0
OSCF
0
RWEL
WEL
RTCF
01h
0037
RTC
(SRAM)
Y2K
0
Y2K21
Y2K20
Y2K13
0
Y2K10
19/20
20h
0036
DW
0
DY2
DY1
DY0
0 to 6
00h
0035
YR
Y23
Y22
Y21
Y20
Y13
Y12
Y11
Y10
0 to 99
00h
0034
MO
0
G20
G13
G12
G11
G10
1 to 12
00h
0033
DT
0
D21
D20
D13
D12
D11
D10
1 to 31
01h
0032
HR
MIL
0
H21
H20
H13
H12
H11
H10
0 to 23
00h
0031
MN
0
M22
M21
M20
M13
M12
M11
M10
0 to 59
00h
0030
SC
0
S22
S21
S20
S13
S12
S11
S10
0 to 59
00h
0014
Control
(EEPROM
)
PWR
SBIB
BSW
0
VTS2
VTS1
VTS0
4Xh
0Xh
0013
DTR
0
DTR2
DTR1
DTR0
00h
0012
ATR
0
ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
00h
0011
INT
IM
AL1E
AL0E
FO1
FO0
0
00h
0010
BL
BP2
BP1
BP0
WD1
WD0
0
18h
000F
Alarm1
(EEPROM
)
Y2K1
0
A1Y2K21 A1Y2K20 A1Y2K13
0
A1Y2K10
19/20
20h
000E
DWA1
EDW1
0
DY2
DY1
DY0
0 to 6
00h
000D
YRA1
Unused - Default = RTC Year value (No EEPROM) - Future expansion
000C
MOA1
EMO1
0
A1G20
A1G13
A1G12
A1G11
A1G10
1 to 12
00h
000B
DTA1
EDT1
0
A1D21
A1D20
A1D13
A1D12
A1D11
A1D10
1 to 31
00h
000A
HRA1
EHR1
0
A1H21
A1H20
A1H13
A1H12
A1H11
A1H10
0 to 23
00h
0009
MNA1
EMN1
A1M22
A1M21
A1M20
A1M13
A1M12
A1M11
A1M10
0 to 59
00h
0008
SCA1
ESC1
A1S22
A1S21
A1S20
A1S13
A1S12
A1S11
A1S10
0 to 59
00h
0007
Alarm0
(EEPROM
)
Y2K0
0
A0Y2K21 A0Y2K20 A0Y2K13
0
A0Y2K10
19/20
20h
0006
DWA0
EDW0
0
DY2
DY1
DY0
0 to 6
00h
0005
YRA0
Unused - Default = RTC Year value (No EEPROM) - Future expansion
0004
MOA0
EMO0
0
A0G20
A0G13
A0G12
A0G11
A0G10
1 to 12
00h
0003
DTA0
EDT0
0
A0D21
A0D20
A0D13
A0D12
A0D11
A0D10
1 to 31
00h
0002
HRA0
EHR0
0
A0H21
A0H20
A0H13
A0H12
A0H11
A0H10
0 to 23
00h
0001
MNA0
EMN0
A0M22
A0M21
A0M20
A0M13
A0M12
A0M11
A0M10
0 to 59
00h
0000
SCA0
ESC0
A0S22
A0S21
A0S20
A0S13
A0S12
A0S11
A0S10
0 to 59
00h
NOTE: Shaded cells indicate that NO other value is to be written to that bit. X indicates the bits are set according to the product variation, see device
“Ordering Information on page 2).
ISL12028, ISL12028A
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