20-101-0525 Rabbit Semiconductor, 20-101-0525 Datasheet - Page 27
20-101-0525
Manufacturer Part Number
20-101-0525
Description
COMPUTER SINGLE-BOARD LP3500 FOX
Manufacturer
Rabbit Semiconductor
Specifications of 20-101-0525
Module/board Type
Single Board Computer Module
Product
Modules
Processor Type
Rabbit 3000
Sram
512 KB
Flash
512 KB
Timers
8 bit, 10 bit
Number Of I/os
26
Backup Battery
3 V Lithium Coin Type
Operating Voltage
3 V to 30 V
Board Size
93 mm x 66 mm x 11 mm
Description/function
Computer Module
For Use With/related Products
LP3500
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1115
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3.2.2 Operating in the Power-Save Mode
VIN may be removed to allow the LP3500 to operate using the external battery once the
LP3500 is in Mode 10. At this point, the LP3500 will draw 200 µA after the subsystems
listed in Table 3 are turned off. The LP3500’s linear regulator may then be turned off using
the
The LP3500 digital I/O can continue to operate (remember that an independent +K source
is required for the digital outputs) using special software routines.
Here are some tips for when the LP3500 is in the power-save mode.
1. Do not write to the SRAM while the LP3500 is in power-save mode and you are relying
2. When the linear regulator is turned off, watch your current consumption carefully since
3.2.3 Resuming Normal-Power or Low-Power Operation
As long as VIN is still connected and the linear regulator has not been turned off, the
LP3500 will return automatically to the previous power mode once the non-zero timeout
specified in
When the timeout is set to 0, which corresponds to an indefinite timeout, the LP3500 may
still be restored to a normal power mode from the power-save mode.
1. Make sure that raw DC power is available at VIN.
2. Turn the linear regulator back on using the
3. Use the
4. Use the
User’s Manual
solely on the onboard backup battery.
too high a current draw could trigger a system reset and turn off the processor.
from VIN. Note that this function only works with LP3500 models, which have the
A/D converter.
setpowersource
NOTE: The processor will turn off if VIN is not available at the expiration of the timeout
or if VIN is not available when a wake-up signal comes in through Serial Port E or the
selected digital input.
rdPowerState
powerMode
serCommAlert
function call, and this will lower the current draw to 100 µA.
function call to set the desired power mode.
function call to establish that the LP3500 is now operating
,
timedAlert
, or
setpowersource
digInAlert
has elapsed.
function call.
21
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