20-101-1221 Rabbit Semiconductor, 20-101-1221 Datasheet - Page 119

• Manufacturer Part Number: 20-101-1221
• Description: RCM4400W (JAPAN TELEC CERTIFIED)
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore®r

Specifications of 20-101-1221

• Frequency: 2.4GHz
• Modulation Or Protocol: 802.11 b
• Power - Output: 16dBm
• Voltage - Supply: 3.3V
• Current - Receiving: 450mA
• Current - Transmitting: 450mA
• Data Interface: Connector, 2 x 25 Header
• Memory Size: 512K Flash, 1MB SRAM
• Antenna Connector: SMA
• Operating Temperature: -20°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Applications: -
• Sensitivity: -
• Data Rate - Maximum: -
• Other names: 316-1147

C.1.3 Reset Generator
The RCM4400W uses a reset generator to reset the Rabbit 4000 microprocessor when the
voltage drops below the voltage necessary for reliable operation. The reset occurs between
2.85 V and 3.00 V, typically 2.93 V.
The RCM4400W has a reset output, pin 3 on header J1.
C.1.4 Onboard Power Supplies
The +3.3 V supplied to the RCM4400W via header J1 powers most of the onboard circuits.
In addition, there is a +1.8 V DC linear regulator that provides the core voltage to the Rabbit
4000 microprocessor. Other linear regulators supply the additional voltage levels needed by
the Wi-Fi circuits. A /DISABLE line from the Rabbit 4000 can be used to disable the Wi-Fi
linear regulators, essentially turning off the Wi-Fi circuits. The
program in the
OEM User’s Manual
SAMPLES\RCM4400W\TCPIP\
Figure C-3. RCM4400W Onboard Power Supplies
+2.90 V DC
+2.80 V DC
+2.50 V DC
+1.2 V DC
Voltage
Power Supply Use
FPGA VCCAUX
FPGA VCCINT
VDD_XCVR
folder demonstrates this functionality.
VDD_VCO
VDD_PA
POWERDOWN.C
sample
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