DS1673S-3+ Maxim Integrated Products, DS1673S-3+ Datasheet - Page 6

• Manufacturer Part Number: DS1673S-3+
• Description: IC CTRLR SYSTEM PORT 3V 20-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Portable System Controllerr

Specifications of DS1673S-3+

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.3 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

TIME OF DAY ALARM BITS Table 1
SPECIAL PURPOSE REGISTERS
The DS1673 has two additional registers (control register and status register) that control the RTC and
interrupts.
CONTROL REGISTER
logic 1, the oscillator is stopped and the DS1673 is placed into a low-power standby mode with a current
drain of less than 200nA when in battery-backup mode. When the DS1673 is powered by V
oscillator is always on regardless of the status of the
when
WP (Write Protect). Before any write operation to the RTC or any other registers, this bit must be logic
0. When high, the write protect bit prevents a write operation to any register.
AIS0-AIS1 (Analog Input Select). These 2 bits are used to determine the analog input for the analog-to-
digital conversion. Table 2 lists the specific analog input that is selected by these 2 bits.
AIE (Alarm Interrupt Enable). When set to a logic 1, this bit permits the Interrupt Request Flag (IRQF)
bit in the status register to assert INT. When the AIE bit is set to logic 0, the IRQF bit does not initiate the
INT signal.
ANALOG INPUT SELECTION Table 2
EOSC
SECONDS MINUTES
ALARM REGISTER MASK BITS (BIT 7)
BIT 7
EOSC
AIS1
1
0
0
0
0
EOSC
0
0
1
1
(Enable Oscillator). This bit, when set to logic 0 will start the oscillator. When this bit is set to a
is a logic 0.
BIT 6
WP
AIS0
1
1
0
0
0
0
1
0
1
HOURS
BIT 5
AIS1
ANALOG INPUT
1
1
1
0
0
NONE
AIN0
AIN1
AIN2
BIT 4
DAYS
AIS0
1
1
1
1
0
6 of 18
Alarm once per second.
Alarm when seconds match.
Alarm when minutes and seconds match.
Alarm when hours, minutes and seconds match.
Alarm when day, hours, minutes and seconds
match.
EOSC
BIT 3
0
bit; however, the RTC is incremented only
BIT 2
DESCRIPTION
0
BIT 1
0
BIT 0
AIE
CC
DS1673
, the