MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 39

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

2.3.12.4
The external oscillator can run up to 22MHz. For this reason an additional clock predivider is
provided; its division ratio is selected via a mask option (see
two, four, eight or ten times slower than the external clock, provided that SLOW mode has not been
entered. If the device is in SLOW mode, a further divide-by-16 oscillator predivider reduces the
CPU clock frequency to a frequency 32, 64, 128 or 160 times slower than the oscillator clock. The
MCAN is directly clocked with the external oscillator frequency divided by two. A block diagram of
the oscillator divider circuit is given in
2.3.13
The PLMA pin is the output of pulse length modulation converter A.
2.3.14
The PLMB pin is the output of pulse length modulation converter B.
MC68HC05X16
OSC1
pin
Oscillator
Oscillator division
PLMA
PLMB
Freescale Semiconductor, Inc.
OSC2
SM bit
For More Information On This Product,
pin
MODES OF OPERATION AND PIN DESCRIPTIONS
Figure 2-7 Oscillator divider block diagram
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4, or
1
,
2,
Figure
5
Control logic
2-7.
f
OSC
/2, /4, /8 or /10
Mask option
2
Section
2
MCAN clock
1.2). This allows a CPU clock
Main internal clock
MCAN module
16
f
/128 or /160
OSC
/32, /64,
2-15
2