45181 Parallax Inc, 45181 Datasheet - Page 176
45181
Manufacturer Part Number
45181
Description
SX TECH TOOL KIT NO POWER
Manufacturer
Parallax Inc
Series
SXr
Type
Microcontrollerr
Datasheet
1.45180.pdf
(184 pages)
Specifications of 45181
Contents
SX Book, SX Key, SX Tech Board, Samples, Resonators, Cable and Manual
Product
Microcontroller Basic Stamps
Operating Supply Voltage
5 V
For Use With/related Products
SX MCUs
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 176 of 184
- Download datasheet (2Mb)
15 Appendix E: SX Data Sheet
In addition, the SX48/52 devices also allow interrupts on certain timer events, like overflow, compare
match, and input capture.
15.5.4 RB0-RB7 Interrupt
The SX offers eight sources of external interrupts; a change of state on any of RB0 – RB7 can generate an
interrupt. These can be individually configured via the WKEN_B and WKED_B configuration registers.
The latency, or response delay, will be five cycles in Turbo mode and ten cycles in Non-Turbo mode.
See “Wake-Up (Interrupt) on Edge Detect” in Chapter 10.2.5 for more information.
15.6 Peripherals
15.6.1 Oscillator Driver
The SX chips offer a configurable oscillator driver that supports five types of oscillators:
LP:
XT:
HS:
RC:
IRC:
An external clock source can also be used to drive the OSC1 pin (leaving the OSC2 pin disconnected) as
in Figure 39 – SX with External Clock.
15.6.1.1
In XT, LP, and HS modes, a crystal or ceramic resonator can be connected to the SX chip as in Figure 37
- SX with External Crystal or in Figure 38 - SX with External Ceramic Resonator. The SX oscillator
driver design requires the use of a parallel cut crystal. Use of a series cut crystal may give a frequency
out of the crystal manufacturer’s specifications. The values of the components can be determined from
Table 34 – External Component Selection for
have internal capacitors so that no external capacitors are required.
Page 176 SX-Key/Blitz Development System Manual 2.0 Parallax, Inc.
Low Power Oscillator
Crystal or Resonator
High Speed Crystal or Resonator
Resistor/Capacitor (external)
Resistor/Capacitor (internal)
LP, XT and HS Mode
Figure 37 - SX with External Crystal
C2
C1
XTL
Crystals
Rp
, below. Please note that some ceramic resonators
OSC1
OSC2
SX
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