DP8572AN National Semiconductor, DP8572AN Datasheet - Page 18

• Manufacturer Part Number: DP8572AN
• Description: IC REAL TIME CLOCK W/RAM 24 DIP
• Manufacturer: National Semiconductor
• Type: Clock/Calendar/NVSRAMr

Specifications of DP8572AN

• Memory Size: 44B
• Time Format: HH:MM:SS:hh (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP8572AN; DP8572

Main Status Register PS
Periodic Flag Register PS
Time Save Control Register PS
Real Time Mode Register PS
Output Mode Register PS
Interrupt Control Register 0 PS
Interrupt Control Register 1 PS
Control and Status Register Address Bit Map
Time Save
Power Fail
Freq XT1
Interrupt
MFO as
Enable
Crystal
Crystal
Enable
Select
Mode
Page
R W
R W
R W
RAM
Test
D7
Single Supply
Low Battery
Osc Fail
Freq XT0
Register
Interrupt
Crystal
Enable
Select
R W
Alarm
R W
RAM
RAM
Flag
D6
R
6
4
e
e
e
X RS
0
0
e
Power Fail
Interrupt
Interrupt
Enable
Enable
Enable
e
Delay
0
e
e
DOW
R W
RAM
1 ms
R W
RAM
RAM
1 ms
Flag
D5
R
0
0
0
e
5
RS
RS
X ADDRESS
RS
e
e
RS
RS
RS
Interrupt EN
on Back-Up
1
0
e
Interrupt
Interrupt
Enable
Enable
Month
10 ms
10 ms
e
R W
RAM
R W
RAM
1
RAM
e
e
Flag
D4
R
0
5
1
1
Address
Address
e
Address
00H
Address
Address
Address
Start Stop
Interrupt
Interrupt
Interrupt
100 ms
100 ms
Enable
Enable
R W
Alarm
e
Clock
e
DOM
R W
RAM
RAM
Flag
D3
R
18
03H
02H
5
e
1
e
01H
e
e
04H
03H
04H
12 24 Hr
Seconds
Seconds
Interrupt
Interrupt
Interrupt
Periodic
Enable
Enable
R W
Hours
Mode
R W
RAM
RAM
Flag
D2
R
5
1
10 Second
10 Second
Power Fail
Leap Year
Interrupt
Interrupt
Interrupt
Enable
Enable
Minute
R W
RAM
MSB
RAM
Flag
D1
R
R
2
5
Leap Year
Interrupt
Interrupt
Interrupt
Second
Enable
Enable
Minute
Minute
Status
R W
RAM
RAM
Flag
LSB
D0
R
R
3
5
1 Reset by
2 Set reset by
3 Reset when
4 Read Osc fail
5 Reset by
6 Set and reset
All Bits R W
All Bits R W
All Bits R W
All Bits R W
writing
1 to bit
voltage at
PFAIL pin
all pending
interrupts
are removed
Write 0 Batt-
Backed Mode
Write 1 Single
Supply Mode
positive edge
of read
by V
voltage
BB