MODULE SPECIFICATIONS
Real-time clock
?
Optional USB: 5V ± 10% @ 1.0A max
Power up
The rise time of both the 3.3V power supply and 5V power supply must be between
..................................................................................
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700 ? s and 140 ms, and the inrush current must be limited to less than 2A.
Real-time clock
The accuracy of the internal Real-Time Clock on the module’s processor is .15%.
I 2 C signals
The I 2 C signals are multiplexed with GPIO.
Legend
? ? SO-DIMM
pin #: Pin number assignment for signal
? ? Signal:
Pin name for each signal.
? ? U/D: Indicates whether the pin has an internal pullup resistor or pulldown resistor.
? U — Pullup
? D— Pulldown
? Blank — Neither an internal pullup or pulldown resistor
? ? OD
(mA): The output drive of an output buffer.
Signals
? ? I/O:
Type of signal input (I), output (O), or input/output (I/O)
SO-DIMM
Signal name
GPIO
U/D
OD
I/O
Description
Pin#
(mA)
55
iic_scl
GPIO[34]
U
4
I/O
I 2 C serial clock line.
Duplicate on GPIO[70]
66
iic_sda
GPIO[35]
U
4
I/O
I 2 C serial data line.
Duplicate on GPIO[71]
26
iic_scl
GPIO[70]
8
I/O
I 2 C serial clock line.
Primary on GPIO[34]
24
iic_sda
GPIIO[71]
8
I/O
I 2 C serial data line.
Primary on GPIO[35]
www.digiembedded.com
67
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