CC-9P-V526UJ-S Digi International, CC-9P-V526UJ-S Datasheet - Page 65

• Manufacturer Part Number: CC-9P-V526UJ-S
• Description: MOD 9P 32MB SDRAM 8MB FLASH
• Manufacturer: Digi International
• Series: -r

Specifications of CC-9P-V526UJ-S

• Module/board Type: Core Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Networking

C u r r e n t M e a s u r e m e n t O p t i o n
How the CMO
works
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Current Measurement Option (CMO) +3.3V
development board and module, R80
ConnectCore 9P 9215, Wi-9P 9215, and 3G 9P 9215 Hardware Reference
The Current Measurement Option uses 0.025R ohm series resistors to measure the
current. The ConnectCore 9P 9215 Development Board allows to measure:


To measure the load current used on different power supplies, measure DC voltage
across the sense (CMO) resistor. The value of the resistor is 0.025
the current using this equation:
where



the current used by the Development Board and module (through R80), and
the current used by the internal NS9215 1.8V core generated from VLIO using a
high-efficiency synchronous step-down converter (through R81)
I = current in Amps
U = measured voltage in Volts
R = 0.025 Ohms
ConnectCore 9P 9215 Development Board
I = U/R
R
± 1%. Calculate
module only, R81
module only, R94
Measurement
+3.3V VLIO for
Measurement
Option (CMO)
Option (CMO)
1.8V core,
+3.3V for
Current
Current