MC68HC05L28B MOTOROLA [Motorola, Inc], MC68HC05L28B Datasheet - Page 30
MC68HC05L28B
Manufacturer Part Number
MC68HC05L28B
Description
Flexible general-purpose microcomputer
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC05L28B.pdf
(156 pages)
- Current page: 30 of 156
- Download datasheet (621Kb)
2
2.2.5.1
The circuit shown in Figure 2-3(a) is recommended when using a crystal . Figure 2-3(d) lists the
recommended capacitance and feedback resistance values. The internal oscillator is designed to
interface with an AT-cut parallel-resonant quartz crystal resonator in the frequency range specified
for f
outside the specified ranges are to be used. The crystal and associated components should be
mounted as close as possible to the input pins to minimize output distortion and start-up
stabilization time. The manufacturer of the particular crystal being considered should be consulted
for specific information.
2.2.5.2
An external clock should be applied to the OSC1 input, with the OSC2 pin left unconnected, as
shown in Figure 2-3(c). The t
external clock input. The equivalent specification of the external clock source should be used in
lieu of t
2.2.6
This active low input pin is used to reset the MCU. Applying a logic zero to this pin forces the device
to a known start-up state. This input has an internal Schmitt trigger to improve noise immunity.
The MCU has its own internal power-on reset (POR) circuit. If, however, the user requires an
additional POR, then an RC network can be connected to this pin as shown in Figure 2-4. The user
must ensure that the RC time constant of this network is greater than the the oscillator stabilization
period. A time constant of at least 100 ms is recommended.
MOTOROLA
2-8
OSC
OXOV
(see Section 12.4). Use of an external CMOS oscillator is recommended when crystals
RESET
.
Crystal
External clock
V
V
SS
DD
MODES OF OPERATION AND PIN DESCRIPTIONS
Figure 2-4 RC connection for external POR
OXOV
R
C
specification (see Section 12.4) does not apply when using an
RESET
MC68HC05L28
MC68HC05L28
TPG
Related parts for MC68HC05L28B
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
6367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
MC1494LMotorola, Inc [MONOLITHIC FOUR-QUADRANT MULTIPLIER]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC1466LMotorola, Inc [PRECISION WIDE RANGE VOLTAGE AND CURRENT REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC145532DWMotorola, Inc [ADPCM Transcoder]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Silicon Controlled Rectifiers
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF Power Field Effect Transistors N-Channel Enhancement-Mode Lateral MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTORS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
LATERAL N-CHANNEL BROADBAND RF POWER MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF LOW POWER TRANSISTOR NPN SILICON
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
PLASTIC SURFACE MOUNT ZENER DIODES 1.5 WATTS 3.3-68 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
OVERVOLTAGE TRANSIENT SUPPRESSOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET 15 AMPERES 60 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET LOGIC LEVEL 19 AMPERES 30 VOLTS RDS(on) = 0.099 OHM
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet: