MC68HC912B32VFU8 Freescale Semiconductor, MC68HC912B32VFU8 Datasheet - Page 226

• Manufacturer Part Number: MC68HC912B32VFU8
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC912B32VFU8

• Cpu Family: HC12
• Device Core Size: 16b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 1KB
• # I/os (max): 63
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

Byte Data Link Communications (BDLC)
15.7.4.7 Invalid Active Bit
In
between the passive-to-active transition beginning the current data bit (or symbol) and A, the current bit
would be invalid.
15.7.4.8 Valid Active Logic 1
In
between A and B, the current bit would be considered a logic 1.
15.7.4.9 Valid Active Logic 0
In
between B and C, the current bit would be considered a logic 0.
15.7.4.10 Valid SOF Symbol
In
between C and D, the current symbol would be considered a valid SOF symbol.
226
Figure
Figure
Figure
Figure
15-8(1), if the active-to-passive received transition beginning the next data bit (or symbol) occurs
15-8(2), if the active-to-passive received transition beginning the next data bit (or symbol) occurs
15-8(3), if the active-to-passive received transition beginning the next data bit (or symbol) occurs
15-8(4), if the active-to-passive received transition beginning the next data bit (or symbol) occurs
PASSIVE
PASSIVE
PASSIVE
PASSIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
Figure 15-8. J1850 VPW Received Active Symbol Times
64 µs
A
A
M68HC12B Family Data Sheet, Rev. 9.1
128 µs
200 µs
B
B
C
C
D
(1) INVALID ACTIVE BIT
(2) VALID ACTIVE LOGIC 1
(3) VALID ACTIVE LOGIC 0
(4) VALID SOF SYMBOL
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