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ISL12058 Datenblatt(PDF) 9 Page - Intersil Corporation

Teilenummer ISL12058
Bauteilbeschribung  Low Cost and Low Power I2C-Bus??Real Time Clock/Calendar
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Hersteller  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL12058 Datenblatt(HTML) 9 Page - Intersil Corporation

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9
FN6756.0
June 15, 2009
Address 09h to 0Bh and 15h to 1Fh are not used. Reads or
writes to these registers will not affect operation of the
device but should be avoided.
A register can be read by performing a random read at any
address at any time. This returns the contents of that register
location. Additional registers are read by performing a
sequential read. For the RTC 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
or write instruction, the address remains at the previous
address +1 so the user can execute a current address read
and continue reading the next register.
.
Real Time Clock Registers
Addresses [00h to 06h]
RTC REGISTERS (SC, MN, HR,DW, DT, MO, YR)
These registers depict BCD representations of the time. As
such, SC (Seconds, address 00h) and MN (Minutes,
address 01h) range from 0 to 59, HR (Hour, address 02h)
can either be a 12-hour or 24-hour mode, DT (Date, address
03h) is 1 to 31, MO (Month, address 04h) is 1 to 12, YR
(Year, address 06h) is 0 to 99, and DW (Day of the Week,
address 06h) is 0 to 6.
The DW register provides a Day of the Week status and uses
three bits DW2 to DW0 to represent the seven days of the
week. The counter advances in the cycle 0-1-2-3-4-5-6-0-1-
2-… The assignment of a numerical value to a specific day
of the week is arbitrary and may be decided by the system
software designer. The default value is defined as “0”.
TABLE 1. REGISTER MEMORY MAP
ADDR. SECTION
REG
NAME
BIT
REG
7
6
543210
RANGE
DEFAULT
00h
RTC
SC
0
SC22
SC21
SC20
SC13
SC12
SC11
SC10
0 to 59
00h
01h
MN
0
MN22
MN21
MN20
MN13
MN12
MN11
MN10
0 to 59
00h
02h
HR
MIL
0
HR21
HR20
HR13
HR12
HR11
HR10
0 to 23
00h
03h
DT
0
0
DT21
DT20
DT13
DT12
DT11
DT10
1 to 31
01h
04h
MO
0
0
0
MO20
MO13
MO12
MO11
MO10
1 to 12
01h
05h
YR
YR23
YR22
YR21
YR20
YR13
YR12
YR11
YR10
0 to 99
00h
06h
DW
0
0
0
0
0
DW12
DW11
DW10
0 to 6
00h
07h
Status
SR
ARST
XSTOP
0
WRTC
OSF
A1F
A2F
PF
N/A
09h
08h
Control
INT
0
ALM1E
ALM2E
FO1
FO0
IRQE
0
A1E
N/A
18h
09h
Not Used
0
0
000000
N/A
00h
0Ah
Not Used
0
0
000000
N/A
00h
0Bh
Not Used
0
0
000000
N/A
00h
0Ch
Alarm1
A1SC
A1M1
A1SC22
A1SC21
A1SC20
A1SC13
A1SC12
A1SC11
A1SC10
00 to 59
00h
0Dh
A1MN
A1M2
A1MN22
A1MN21
A1MN20
A1MN13
A1MN12
A1MN11
A1MN10
00 to 59
00h
0Eh
A1HR
A1M3
A1MIL
A1HR21
A1HR20
A1HR13
A1HR12
A1HR11
A1HR10
0 to 23
00h
0Fh
A1DT
A1M4
0
A1DT21
A1DT20
A1DT13
A1DT12
A1DT11
A1DT10
1 to 31
00h
10h
A1MO
A1M5
0
0
A1MO20
A1MO13
A1MO12
A1MO11
A1MO10
1 to 12
00h
11h
A1DW
A1M6
0
0
0
0
A1DW12
A1DW11
A1DW10
0 to 6
00h
12h
Alarm2
A2MN
A2M2
A2MN22
A2MN21
A2MN20
A2MN13
A2MN12
A2MN11
A2MN10
00 to 59
00h
13h
A2HR
A2M3
A2MIL
A2HR21
A2HR20
A2HR13
A2HR12
A2HR11
A2HR10
0 to 23
00h
14h
A2DW/DT
A2M4
A2DW/DT
A2DT21
A2DT20
A2DT13
A2DT12
A2DT11
A2DT10
1 to 31
00h
A2DW12
A2DW11
A2DW10
0 to 6
00h
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