20-101-1131 Rabbit Semiconductor, 20-101-1131 Datasheet - Page 125
20-101-1131
Manufacturer Part Number
20-101-1131
Description
MODULE RCM4200 RABBITCORE
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-1132.pdf
(134 pages)
Specifications of 20-101-1131
Module/board Type
MPU Core Module
Product
Microcontroller Modules
Core Processor
Rabbit 4000
Flash
512 KBytes
Operating Supply Voltage
3 to 3.6 V
Board Size
61 mm x 47 mm x 21 mm
Cpu Core
Rabbit 4000
For Use With/related Products
RCM4200
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1124
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C.1 Power Supplies
The RCM4200 requires a regulated 3.0 V – 3.6 V DC power source. The RabbitCore
design presumes that the voltage regulator is on the user board, and that the power is made
available to the RCM4200 board through header J2.
An RCM4200 with no loading at the outputs operating at 58.98 MHz typically draws
240 mA, and may draw up to 275 mA at 3.6 V and 85°C; the corresponding current draw
for the RCM4210 is typically 200 mA, and up to 225 mA at 3.6 V and 85°C.
C.1.1 Battery Backup
The RCM4200 does not have a battery, but there is provision for a customer-supplied bat-
tery to back up the data SRAM and keep the internal Rabbit 4000 real-time clock running.
Header J2, shown in Figure C-1, allows access to the external battery. This header makes
it possible to connect an external 3 V power supply. This allows the SRAM and the inter-
nal Rabbit 4000 real-time clock to retain data with the RCM4200 powered down.
A lithium battery with a nominal voltage of 3 V and a minimum capacity of 165 mA·h is
recommended. A lithium battery is strongly recommended because of its nearly constant
nominal voltage over most of its life.
User’s Manual
Appendix C provides information on the current requirements of
the RCM4200, and includes some background on the chip select
circuit used in power management.
Figure C-1. External Battery Connections
A
PPENDIX
at Header J2
C. P
OWER
S
UPPLY
119
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