MC9S12E256MFUE Freescale Semiconductor, MC9S12E256MFUE Datasheet - Page 269

• Manufacturer Part Number: MC9S12E256MFUE
• Description: IC MCU 256K FLASH 25MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12E256MFUE

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 60
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.35 V ~ 2.75 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 80-QFP
• Processor Series: S12E
• Core: HCS12
• Data Bus Width: 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C/SCI/SPI
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 60
• Number Of Timers: 12
• Operating Supply Voltage: 0 V to 5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 16-ch x 10-bit
• On-chip Dac: 2-ch x 8-bit
• Controller Family/series: HCS12/S12X
• No. Of I/o's: 60
• Ram Memory Size: 16KB
• Cpu Speed: 25MHz
• No. Of Timers: 3
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• For Use With: M68EVB912E128 - BOARD EVAL FOR MC9S12E128/64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

In
at RT5 is high. The RT5 sample sets the noise flag. Although this is a worst-case misalignment of
perceived bit time, the data samples RT8, RT9, and RT10 are within the bit time and data recovery is
successful.
Figure 8-19
synchronization with the start bit time, it does set the noise flag.
Freescale Semiconductor
RT CLOCK COUNT
RT CLOCK COUNT
RESET RT CLOCK
RESET RT CLOCK
Figure
RT CLOCK
RT CLOCK
SAMPLES
SAMPLES
8-18, a large burst of noise is perceived as the beginning of a start bit, although the test sample
shows the effect of noise early in the start bit time. Although this noise does not affect proper
RXD
RXD
1
1
1
1
1
1
1
0
1
Figure 8-18. Start Bit Search Example 3
Figure 8-19. Start Bit Search Example 4
1
0
MC9S12E128 Data Sheet, Rev. 1.07
1
1
1
PERCEIVED START BIT
1
0
0
0
1
0
PERCEIVED AND ACTUAL START BIT
0
0
ACTUAL START BIT
Chapter 8 Serial Communication Interface (SCIV3)
LSB
LSB
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