XC68HC705B32CFN Freescale Semiconductor, XC68HC705B32CFN Datasheet - Page 39

• Manufacturer Part Number: XC68HC705B32CFN
• Description: IC MCU 2.1MHZ 32K OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of XC68HC705B32CFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 256 x 8
• Ram Size: 528 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.5.5
The TCAP2 input controls the input capture 2 function of the on-chip programmable timer system.
2.5.6
The TCMP1 pin is the output of the output compare 1 function of the timer system.
2.5.7
The TCMP2 pin is the output of the output compare 2 function of the timer system.
2.5.8
These pins provide control input for an on-chip oscillator circuit. A crystal, ceramic resonator or
external clock signal connected to these pins supplies the oscillator clock. The oscillator frequency
(f
which introduces an additional divide by 16 into the oscillator clock, giving an internal bus
frequency of f
2.5.8.1
The circuit shown in
resonator.
internal oscillator is designed to interface with an AT-cut parallel-resonant quartz crystal resonator
in the frequency range specified for f
is recommended when crystals 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 minimise
output distortion and start-up stabilisation time. The manufacturer of the particular crystal being
considered should be consulted for specific information.
2.5.8.2
A ceramic resonator may be used instead of a crystal in cost sensitive applications. The circuit shown
in
lists the recommended capacitance and feedback resistance values. The manufacturer of the
particular ceramic resonator being considered should be consulted for specific information.
MC68HC05B6
Rev. 4.1
OSC
Figure
) is divided by two to give the internal bus frequency (f
2-5(a) is recommended when using either a crystal or a ceramic resonator.
Figure
OSC
TCAP2
TCMP1
TCMP2
OSC1, OSC2
Crystal
Ceramic resonator
/32.
2-5(d) lists the recommended capacitance and feedback resistance values. The
MODES OF OPERATION AND PIN DESCRIPTIONS
Figure
2-5(a) is recommended when using either a crystal or a ceramic
OSC
(see
Section
11.4). Use of an external CMOS oscillator
OP
). There is also a software option
Figure
Freescale
2-5(d)
2-11
2