20-101-1138 Rabbit Semiconductor, 20-101-1138 Datasheet - Page 119
20-101-1138
Manufacturer Part Number
20-101-1138
Description
RCM4300 RABBITCORE
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-1139.pdf
(124 pages)
Specifications of 20-101-1138
Module/board Type
MPU Core Module
Product
Microcontroller Modules
Data Bus Width
8 bit
Core Processor
Rabbit 4000
Clock Speed
58.98 MHz
Interface Type
Ethernet
Flash
2 MBytes
Timers
10 x 8 bit
Operating Supply Voltage
3.3 V
Board Size
72 mm x 47 mm x 21 mm
For Use With/related Products
RCM4300
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1141
- Current page: 119 of 124
- Download datasheet (2Mb)
The drain on the battery by the RCM4300 is typically 7.5 µA when no other power is sup-
plied. If a 165 mA·h battery is used, the battery can last about 2.5 years:
The actual battery life in your application will depend on the current drawn by components
not on the RCM4300 and on the storage capacity of the battery. The RCM4300 does not
drain the battery while it is powered up normally.
Cycle the main power off/on after you install a backup battery for the first time, and when-
ever you replace the battery. This step will minimize the current drawn by the real-time
clock oscillator circuit from the backup battery should the RCM4300 experience a loss of
main power.
Rabbit Semiconductor’s Technical Note TN235, External 32.768 kHz Oscillator Circuits,
provides additional information about the current draw by the real-time clock oscillator
circuit.
C.1.2 Battery-Backup Circuit
Figure C-2 shows the battery-backup circuit.
The battery-backup circuit serves three purposes:
• It reduces the battery voltage to the SRAM and to the real-time clock, thereby limiting
• It ensures that current can flow only out of the battery to prevent charging the battery.
• A voltage, VOSC, is supplied to U14, which keeps the 32.768 kHz oscillator working
RabbitCore RCM4300 User’s Manual
the current consumed by the real-time clock and lengthening the battery life.
when the voltage begins to drop.
NOTE: Remember to cycle the main power off/on any time the RCM4300 is removed
165 mA·h
----------------------- -
7.5 µA
from the Prototyping Board or motherboard since that is where the backup battery
would be located.
=
Figure C-2. RCM4300 Backup Battery Circuit
2.5 years.
W
W
119
Related parts for 20-101-1138
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
COMPUTER SGL-BRD BL2500 29.4MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
COMPUTER SGL-BRD BL2500 29.4MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
DISPLAY GRAPHIC 12KEY PROG OP670
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
DISPLAY GRAPHIC 12KEY ETH OP6700
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2030
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
COMPUTER SGL-BOARD ETH BL2010
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
MODULE OP6810 W/O ETH/MEM EXPANS
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2020
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
COMPUTER BL2010 W/FRICTION LOCK
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
COMPUTER BL2020 W/FRICTION LOCK
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
COMPUTER SGL-BRD BL2500 44.2MHZ
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
COMPUTER SGL-BOARD FULL BL2000
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
COMPUTER SINGLE-BOARD BL2110
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
COMPUTER SGL-BRD 29.4MHZ BL2610
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
INTERFACE OP6800 512K FLASH&SRAM
Manufacturer:
Rabbit Semiconductor
Datasheet: