ISL1219 Datasheet, PDF (12/24 Pages) Intersil Corporation – Low Power RTC with Battery Backed SRAM and Event Detection

ISL1219
sequential read. For the RTC and Alarm registers, the read
instruction latches all clock registers into a buffer, so an
update of the clock does not change the time being read. A
sequential read will not result in the output of data from the
memory array. At the end of a read, the master supplies a
stop condition to end the operation and free the bus. After a
read, the address remains at the previous address +1 so the
user can execute a current address read and continue
reading the next register.
It is not necessary to set the WRTC bit prior to writing into
the control and status, alarm, and user SRAM registers.
TABLE 5. REGISTER MEMORY MAP
BIT
REG
ADDR. SECTION NAME
7
6
5
4
3
2
1
0
RANGE DEFAULT
00h
SC
0
SC22
SC21
SC20
SC13
SC12
SC11
SC10
0-59
00h
01h
MN
0
MN22 MN21 MN20 MN13 MN12 MN11 MN10
0-59
00h
02h
HR
MIL
0
HR21
HR20
HR13
HR12
HR11
HR10
0-23
00h
03h
RTC
DT
0
0
DT21
DT20
DT13
DT12
DT11
DT10
1-31
00h
04h
MO
0
0
0
MO20 MO13 MO12 MO11 MO10
1-12
00h
05h
YR
YR23
YR22
YR21
YR20
YR13
YR12
YR11
YR10
0-99
00h
06h
DW
0
0
0
0
0
DW2
DW1
DW0
0-6
00h
07h
SR ARST XTOSCB Reserved WRTC
EVT
ALM
BAT
RTCF
N/A
01h
08h
INT
IM
ALME LPMODE FOBATB FO3
FO2
FO1
FO0
N/A
00h
Control
09h
and
EV EVIENB EVBATB RTCHLT EVEN EHYS1 EHYS0 ESMP1 ESMP0 N/A
00h
Status
0Ah
ATR BMATR1 BMATR0 ATR5
ATR4
ATR3
ATR2
ATR1
ATR0
N/A
00h
0Bh
DTR Reserved
DTR2 DTR1 DTR0
N/A
00h
0Ch
SCA ESCA ASC22 ASC21 ASC20 ASC13 ASC12 ASC11 ASC10 00-59
00h
0Dh
MNA EMNA AMN22 AMN21 AMN20 AMN13 AMN12 AMN11 AMN10 00-59
00h
0Eh
HRA EHRA
0
AHR21 AHR20 AHR13 AHR12 AHR11 AHR10 0-23
00h
Alarm
0Fh
DTA EDTA
0
ADT21 ADT20 ADT13 ADT12 ADT11 ADT10 1-31
00h
10h
MOA EMOA
0
0
AMO20 AMO13 AMO12 AMO11 AMO10 1-12
00h
11h
DWA EDWA
0
0
0
0
ADW12 ADW11 ADW10
0-6
00h
12h
USR1 USR17 USR16 USR15 USR14 USR13 USR12 USR11 USR10
N/A
00h
User
13h
USR2 USR27 USR26 USR25 USR24 USR23 USR22 USR21 USR20
N/A
00h
14h
SCT
0
SCT22 SCT21 SCT20 SCT13 SCT12 SCT11 SCT10 00-59
00h
15h
MNT
0
MNT22 MNT21 MNT20 MNT13 MNT12 MNT11 MNT10 00-59
00h
16h
Time
HRT
MILT
Stamp
17h
DTT
0
0
HRT21 HRT20 HRT13 HRT12 HRT11 HRT10 0-23
00h
0
DTT21 DTT20 DTT13 DTT12 DTT11 DTT10 1-31
00h
18h
MOT
0
0
0
MOT20 MOT13 MOT12 MOT11 MOT10 1-12
00h
19h
YRT YRT23 YRT22 YRT21 YRT20 YRT13 YRT12 YRT11 YRT10 0-99
00h
12
FN6314.2
July 15, 2010