20-101-1258 Rabbit Semiconductor, 20-101-1258 Datasheet - Page 122

• Manufacturer Part Number: 20-101-1258
• Description: COMPUTER SINGLE-BOARD BL4S160
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-1258

• Module/board Type: Single Board Computer Module
• Product: Modules
• Processor Type: Rabbit 4000
• Sram: 1 MB
• Flash: 2 MB
• Timers: 8 bit, 10 bit
• Number Of I/os: 20
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 9 V to 36 V
• Board Size: 96 mm x 146 mm x 16 mm
• Description/function: Computer Module
• For Use With/related Products: BL4S160
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1171

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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