MC68HC912B32CFU8 Freescale Semiconductor, MC68HC912B32CFU8 Datasheet - Page 224

• Manufacturer Part Number: MC68HC912B32CFU8
• Description: IC MCU 32K FLASH 8MHZ 80-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC68HC912B32CFU8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 768 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Byte Data Link Communications (BDLC)
15.7.4.1 Invalid Passive Bit
See
occurs between the active-to-passive transition beginning the current data bit (or symbol) and A, the
current bit would be invalid.
15.7.4.2 Valid Passive Logic 0
See
occurs between A and B, the current bit would be considered a logic 0.
15.7.4.3 Valid Passive Logic 1
See
occurs between B and C, the current bit would be considered a logic 1.
15.7.4.4 Valid EOD Symbol
See
occurs between C and D, the current symbol would be considered a valid end-of-data symbol (EOD).
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Figure
Figure
Figure
Figure
15-6(1). If the passive-to-active received transition beginning the next data bit or symbol
15-6(2). If the passive-to-active received transition beginning the next data bit (or symbol)
15-6(3). If the passive-to-active received transition beginning the next data bit (or symbol)
15-6(4). If the passive-to-active received transition beginning the next data bit (or symbol)
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
ACTIVE
PASSIVE
Figure 15-6. J1850 VPW Received Passive Symbol Times
64 µs
A
A
M68HC12B Family Data Sheet, Rev. 9.1
128 µs
200 µs
B
B
C
C
D
(1) INVALID PASSIVE BIT
(2) VALID PASSIVE LOGIC 0
(3) VALID PASSIVE LOGIC 1
(4) VALID EOD SYMBOL
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