1339-2DVGI IDT, 1339-2DVGI Datasheet - Page 10

• Manufacturer Part Number: 1339-2DVGI
• Description: Real Time Clock RTC BASE
• Manufacturer: IDT

Specifications of 1339-2DVGI

• Rohs: yes
• Part # Aliases: IDT1339-2DVGI

Trickle Charger Register (10h)
Programmable Trickle Charger
The simplified “Programmable Trickle Charger” schematic shows the basic components of the trickle charger. The
trickle-charge select (TCS) bits (bits 4 to 7) control the selection of the trickle charger. To prevent accidental enabling, only
a pattern of 1010 on the TCS bits enables the trickle charger. All other patterns disable the trickle charger. The trickle
charger is disabled when power is first applied. The diode-select (DS) bits (bits 2 and 3) select whether or not a diode is
connected between
and V
Table 6. Trickle Charger Register (10h)
Warning: The ROUT value of 250 must not be selected whenever
IDT® REAL-TIME CLOCK WITH SERIAL I
TCS3
Bit 7
IDT1339
REAL-TIME CLOCK WITH SERIAL I
X
X
X
1
1
1
1
1
1
0
BACKUP
TCS2
Bit 6
X
X
X
0
0
0
0
0
0
0
. Table 6 shows the bit values.
TCS1
Bit 5
X
X
X
1
1
1
1
1
1
0
V
CC
and V
TCS0
Bit 4
X
X
X
0
0
0
0
0
0
0
BACKUP
2
Bit 3
C INTERFACE
DS1
0
1
X
0
1
0
1
0
1
0
2
C INTERFACE
. The ROUT bits (bits 0 and 1) select the value of the resistor connected between
Bit 2
DS0
0
1
X
1
0
1
0
1
0
0
ROUT 1
Bit 1
X
X
0
0
0
1
1
1
1
0
ROUT 0
10
Bit 0
X
X
0
1
1
0
0
1
1
0
Disabled
Disabled
Disabled
No diode, 250 resistor
One diode, 250 resistor
No diode, 2k resistor
One diode, 2k resistor
No diode, 4k resistor
One diode, 4k resistor
Initial power-up values
V
CC
is greater than 3.63 V.
Function
IDT1339
REV R 121012
RTC
V
CC