Pin Number
Pin Name
I/O
Description
47
NC
-
Not Connected
48
-
-
Reserved
49
NC
-
Not Connected
50
GND
Power
Power (GND)
51
NC
-
Not Connected
52
WLAN_VDD
Power
Power (WLAN_VDD)
11.16. CON22 RTC Backup Interface 2
CON22 is an external backup interface for real-time clock functionality. Please use it when you want to retain time data
while power is off for an extended period.
Mounted Connector
DF13C-2P-1.25V(21)/HIROSE ELECTRIC
Matching Connector
Example
DF13-2S-1.25C/HIROSE ELECTRIC (Housing)
DF13-2630SCF/HIROSE ELECTRIC (Contact)
Allowable Current
1A (per terminal)
Compatible Battery
Example
CR2032 WK11/Hitachi Maxell
[2]
etc
Table 11.20. CON22 Signals
Pin Number
Pin Name
I/O
Description
1
RTC_BAT2
Power
Real-time clock external backup power in
2
GND
Power
Power (GND)
The average monthly gap of the real-time clock differs depending on the RTC ver-
sion in the board information. The relationship between the versions and the average
monthly difference (reference value) at an ambient temperature of 25°C is shown
below.
Table 11.21. RTC Versions and Average Monthly Difference (Reference Value)
at 25°C Ambient Temperature
RTC Version
Average Monthly Difference at 25°C Ambient Temperature
1.0
Approx. 300 seconds
1.1 or later
Approx 90 seconds
The RTC version can be checked with the following command.
[armadillo ~]# dmesg | grep bmic_rtc
[ 1.639111] bmic_rtc 3-0011: version: 1.1
Even if the RTC version is 1.0, you can update to RTC version 1.1 or later by
applying installation disk v20161026_iotg3 or later (in-
[2]
For more information, please contact an Armadillo dealer.
Armadillo-IoT Gateway G3Product Manual - INTL
Interface Specifications
125
