MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 109

• 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

edge will be placed artificially. The last bit received in the data shift register is inverted to a logic
one, and the three logic one start qualifiers (shown in
register during the interval when detection of a start bit is anticipated (see
the start bit will be accepted no sooner than it is anticipated.
MC68HC05X16
RDI
RDI
RDI
16X internal sampling clock
RT clock edges for all three examples
Idle
1
1
1
Freescale Semiconductor, Inc.
Previous bit
RDI
1
1
1
Figure 7-4 SCI examples of start bit sampling technique
1
1
1
For More Information On This Product,
Figure 7-5 SCI sampling technique used on all bits
16RT 1RT
1
1
1
SERIAL COMMUNICATIONS INTERFACE
1
1
1
Noise
Go to: www.freescale.com
Present bit
1
1
0
1
1
1
1
1
1
1
1
1
qualifiers
8RT 9RT 10RT
Start
1
1
1
Samples
1
1
1
Start
Start
Start
1RT 2RT 3RT
0
0
0
Figure
0
0
0
verification samples
7-4) are forced into the sample shift
4RT
Start edge
Noise
5RT
16RT 1RT
0
1
0
6RT
Next bit
7RT
0
0
0
Figure
8RT
7-6); therefore,
7-7
7