AT73C224-C_14 Datasheet, PDF (4/75 Pages) ATMEL Corporation – Ultra-low Power Real-time Clock (RTC) and Backup Battery Management

3. Pinout
Table 3-1.
Pin Name
VO3
VDD3
GNDANA
VCAPP
VINT
AT73C224 Pinout
I/O Pin #
O
1
PS
2
PS
3
I/O
4
PS
5
VDD0
PS
6
VCAPN
VBG
VDD2
I/O
7
O
8
PS
9
VBAT_LDORTC PS
10
VO2
EN
D4
POK
ITB/RDY
SW2
GND2
VO1
DH1
DL1
VSENSE1
I
11
I
12
I
13
O
14
I/O
15
O
16
PS
17
I
18
O
19
O
20
I
21
VDD1
PS
22
VDD4
VO4
PS
23
O
24
VDDIO
PS
25
D1
D2
D3
CK32
XOUT
XIN
VBACKUP
I
26
I/O
27
I
28
O
29
I/O
30
I/O
31
O
32
GND/AVSS
PS
33
Type
Analog
Power
Ground
Analog
Power
Analog
Analog
Analog
Power
Power
Analog
Digital
Digital
Digital
Digital
Analog
Ground
Analog
Analog
Analog
Analog
Power
Power
Analog
Digital
supply
Digital
Digital
Digital
Digital
Analog
Analog
Analog
Ground
Function
Comments
LDO3 output voltage
Ext. 2.2 µF capacitor (mandatory)
LDO3 supply voltage
Analog ground
Not connected
Output of the internal LDO
Ext. 470 nF capacitor (mandatory)
Supply of the internal LDO
Must be connected to the main
battery (mandatory)
Not connected
Bandgap reference voltage
Should not be resistively loaded
BUCK2 supply voltage
LDO_RTC Supply voltage
Must be connected to the main
battery (mandatory)
BUCK2 output voltage
Enable signal
Internal 100 KΩ pull up
Digital interface
Internal 100 KΩ pull up
Power Ok: indicates when start-up is completed
User Interrupt, GPIO and Shutdown control
Internal 100 KΩ pull up
BUCK2 inductor (NMOS switcher output)
BUCK2 ground
BOOST1 output voltage
Not connected
BOOST1 NMOS control signal
BOOST1 current limitation sense voltage
BOOST1 supply voltage
Must be connected to the main
battery
LDO4 supply voltage
LDO4 output voltage
Ext. 2.2 µF capacitor (mandatory)
Supply voltage for Digital I/O
Digital interface
Digital interface
Digital interface
32 kHz RTC output clock
RTC crystal oscillator output
RTC crystal oscillator input
Backup Battery and RTC supply
Main G_ND and AV_SS ground
open drain
open drain
open drain
die paddle connected to ground
(mandatory)
4 AT73C224
6266A–PMAAC–08-Sep-08