20-101-1257 Rabbit Semiconductor, 20-101-1257 Datasheet - Page 26
20-101-1257
Manufacturer Part Number
20-101-1257
Description
COMPUTER SINGLE-BOARD BL4S150
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-101-1258.pdf
(144 pages)
Specifications of 20-101-1257
Module/board Type
Single Board Computer Module
Product
Modules
Processor Type
Rabbit 4000
Sram
1 MB
Flash
2 MB
Timers
8 bit, 10 bit
Number Of I/os
20
Backup Battery
3 V Lithium Coin Type
Operating Voltage
9 V to 36 V
Board Size
96 mm x 146 mm x 16 mm
Description/function
Computer Module
For Use With/related Products
BL4S150
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
316-1170
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3.2.2.1 PWM/PPM Outputs Setup
PWM and PPM outputs on the BL4S100 are configured using the
setPPM()
BL4S100 User’s Manual
A PWM output is described as noninverted
when it starts high, remains high for a duty
cycle that is a fraction of the period, then
goes low for the remainder of the period.
Similarly, an inverted PWM output starts
low, remains low for a duty cycle that is a
fraction of the period, then goes high for
the remainder of the period.
A PWM output is normally set up to start
when triggered by an event, and may be
set up so that the leading and trailing edges
of several PWM outputs are aligned as
long as the all the PWM outputs are on the
same block of a particular Rabbit RIO
chip.
A PPM ouput is similar to a PWM output,
except it is shifted by an offset relative to
the event that triggered the start of the
PPM output.
A PPM output is either inverted or nonin-
verted, based on whether it starts high or
low, and may be set up so that their lead-
ing and trailing edges of several PPM out-
puts are aligned as long as the all the PPM
outputs are on the same block of a particu-
lar Rabbit RIO chip
function calls.
setPWM()
and
24
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