Embedian, Inc.
43
SMART-BEE User’s Manual Document Revision v.1.2
Power Input Connector:
2-pin screw type terminal block
Edge
Finger
Sitara AM335x CPU
Type
Header
Pin
Signal Name
Function
Pin#
Ball
Mode
Signal
Name
1
5V
5V
Input
P
2
GND
Ground
Power
P
3.1.3.10. SMARC Module Connector: CN1
The SMARC Module is supported on CN1. This is a 314 pin MXM3 style
connector. The CN1 pin-out conforms to the SMARC Module specification.
Only 3.3V Module I/O can be supported on the SMARC T335X Evaluation
Carrier.
The MXM3 style connector used on the SMART-BEE Evaluation Carrier is
with a board-to-board spacing of 5mm. Other stack height options are
available, including 1.8MM, 2.7mm and 8mm.
The Evaluation Carrier has captive M2.5 threaded standoffs in the
SMARC mounting hole positions. The standoffs accept M2.5 screws,
inserted from above, through the Module holes.
Only 82mm x 50mm format SMARC Modules may be used with the
SMART-BEE Evaluation Carrier. The Evaluation Carrier PCB has a
cut-out allowing access to the back side of the SMARC Module for test
and debug.
3.1.3.11. RTC Backup Battery: CN3
A 6.8mm diameter 3V lithium coin cell battery is available on the
Evaluation Carrier in position CN3. The part number of coin cell battery on
CN3 is
Seiko MS621F_FL11E
.
The battery ‘+’ terminal is protected against charging (as required by
safety regulations) by a Schottky diode and a 49.9 Ohm resistor (R10).
The 49.9 resistor feeds the SMARC VDD_RTC pin (SMARC pin S147).
