MC9S12XDT512CAA Freescale, MC9S12XDT512CAA Datasheet - Page 505

• Manufacturer Part Number: MC9S12XDT512CAA
• Manufacturer: Freescale

Specifications of MC9S12XDT512CAA

• Cpu Family: HCS12
• Device Core Size: 16b
• Frequency (max): 40MHz
• Interface Type: CAN/I2C/SCI/SPI
• Total Internal Ram Size: 32KB
• # I/os (max): 59
• Number Of Timers - General Purpose: 12
• Operating Supply Voltage (typ): 2.5/5V
• Operating Supply Voltage (max): 2.75/5.5V
• Operating Supply Voltage (min): 2.35/3.15V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 512KB
• Lead Free Status / RoHS Status: Compliant

In
not the beginning of a start bit. The RT clock is reset and the start bit search begins again. The noise flag
is not set because the noise occurred before the start bit was found.
In
perceived bit time is misaligned, the data samples RT8, RT9, and RT10 are within the bit time and data
recovery is successful.
Freescale Semiconductor
Figure 11-22
Figure
RT Clock Count
Reset RT Clock
RT Clock Count
Reset RT Clock
RT Clock
RT Clock
Samples
Samples
11-23, verification sample at RT3 is high. The RT3 sample sets the noise flag. Although the
RXD
RXD
the verification samples RT3 and RT5 determine that the first low detected was noise and
1
1
1
1
1
1
1
0
1
Figure 11-22. Start Bit Search Example 1
Figure 11-23. Start Bit Search Example 2
0
1
MC9S12XDP512 Data Sheet, Rev. 2.21
1
1
1
0
0
Perceived Start Bit
0
0
0
0
0
0
Actual Start Bit
Chapter 11 Serial Communication Interface (S12SCIV5)
Start Bit
0
0
0
0
LSB
LSB
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