101-1279 Rabbit Semiconductor, 101-1279 Datasheet - Page 122

• Manufacturer Part Number: 101-1279
• Description: PLASTIC ENCLOSURE FOR BL4S100
• Manufacturer: Rabbit Semiconductor

Specifications of 101-1279

• Accessory Type: Enclosure
• Product: Prototyping Accessories
• Processor Type: BL4S100
• Board Size: 146 mm x 96 mm x 16 mm
• Interface Type: Ethernet
• For Use With/related Products: BL4S100
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Other names: 316-1159

B.1 Power Supplies
Power is supplied to the BL4S100 boards via the Micro-Fit
BL4S100 is protected against reverse polarity by a diode at D27 as shown in Figure B-1.
The input voltage range is from 9 V to 36 V. A switching power regulator is used to provide
+5 V for the BL4S100 logic circuits. In turn, the regulated +5 V DC power supply is used
to drive regulated +1.8 V and +3.3 V power supplies.
The digital ground and the analog ground share a single split ground plane on the board,
with the analog ground connected at a single point to the digital ground by a 0  resistor
(R63). This is done to minimize digital noise in the analog circuits and to eliminate the
possibility of ground loops. External connections to analog ground are made on a screw-
terminal header at J15.
BL4S100 User’s Manual
Appendix B describes the power circuitry provided on the
BL4S100.
A
Figure B-1. BL4S100 Power Supply
PPENDIX
B. P
®
OWER
connector at J17. The
S
UPPLY
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