1339-31DVGI8 IDT, 1339-31DVGI8 Datasheet - Page 6

• Manufacturer Part Number: 1339-31DVGI8
• Description: Real Time Clock Real Time Clock
• Manufacturer: IDT

Specifications of 1339-31DVGI8

• Rohs: yes
• Part # Aliases: IDT1339-31DVGI8

Address Map
Table 3 (Timekeeper Registers) shows the address map for the IDT1339 registers. During a multibyte access, when the
address pointer reaches the end of the register space (10h), it wraps around to location 00h. On an I
address pointer incrementing to location 00h, the current time is transferred to a second set of registers. The time
information is read from these secondary registers, while the clock may continue to run. This eliminates the need to re-read
the registers in case of an update of the main registers during a read.
Table 3. Timekeeper Registers
Note: Unless otherwise specified, the state of the registers are not defined when power is first applied or when V
below the V
IDT® REAL-TIME CLOCK WITH SERIAL I
Address
IDT1339
REAL-TIME CLOCK WITH SERIAL I
0Ch
0Dh
0Ah
0Bh
0Eh
0Fh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
10h
BACKUP(min)
Century
EOSC
A1M1
A1M2
A1M3
A1M4
A2M2
A2M3
A2M4
TCS3
Bit 7
OSF
0
0
0
0
0
.
DY/DT
DY/DT
12/24
TCS2
12/24
12/24
Bit 6
0
0
0
0
0
10 year
10 seconds
10 seconds
10 minutes
10 minutes
10 minutes
10 hour
10 hour
10 hour
AM/PM
AM/PM
AM/PM
BBSQI
2
TCS1
Bit 5
C INTERFACE
0
0
0
2
C INTERFACE
10 date
10 date
10 date
10 month
10 hour
10 hour
10 hour
TCS0
Bit 4
RS2
0
0
Bit 3
RS1
DS1
0
0
6
INTCN
Bit 2
DS0
0
Day, Date
Day, Date
Seconds
Seconds
Minutes
Minutes
Minutes
Month
Hour
Hour
Hour
Date
Year
ROUT1
Bit 1
A2IE
A2F
Day
ROUT0
Bit 0
A1IE
A1F
Trickle Charger
Month/Century
Alarm 1 Hours
Alarm 2 Hours
Alarm 1 Date
Alarm 2 Date
Alarm 1 Day,
Alarm 2 Day,
Function
Seconds
Seconds
Minutes
Alarm 1
Alarm 1
Minutes
Alarm 2
Minutes
IDT1339
Control
Status
Hours
Date
Year
Day
2
CC
C START, STOP, or
and V
BACKUP
REV R 121012
1 - 7, 1 - 31
1 - 7, 1 - 31
+ AM/PM
+ AM/PM
+ AM/PM
01 - 12 +
Century
Range
00 - 59
00 - 59
00 - 23
01 - 31
00 - 99
00 - 59
00 - 59
00 - 23
00 - 59
00 - 23
1 - 12
1 - 12
1 - 12
1 - 7
RTC
falls