S9S12GA192F0MLHR Freescale Semiconductor, S9S12GA192F0MLHR Datasheet - Page 624
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S9S12GA192F0MLHR
Manufacturer Part Number
S9S12GA192F0MLHR
Description
16-bit Microcontrollers - MCU 16BIT192KFLASH 11264 RAM
Manufacturer
Freescale Semiconductor
Datasheet
1.S9S12G96F0CLL.pdf
(1292 pages)
Specifications of S9S12GA192F0MLHR
Rohs
yes
Core
S12
Processor Series
MC9S12G
Data Bus Width
16 bit
Maximum Clock Frequency
25 MHz
Program Memory Size
192 KB
Data Ram Size
2 KB
On-chip Adc
Yes
Operating Supply Voltage
3.13 V to 5.5 V
Operating Temperature Range
- 40 C to + 125 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Available stocks
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40 000
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Freescale’s Scalable Controller Area Network (S12MSCANV3)
18.4.3.1
The MSCAN protects the user from accidentally violating the CAN protocol through programming errors.
The protection logic implements the following features:
18.4.3.2
Figure 18-43
The clock source bit (CLKSRC) in the CANCTL1 register (18.3.2.2/18-592) defines whether the internal
CANCLK is connected to the output of a crystal oscillator (oscillator clock) or to the bus clock.
The clock source has to be chosen such that the tight oscillator tolerance requirements (up to 0.4%) of the
CAN protocol are met. Additionally, for high CAN bus rates (1 Mbps), a 45% to 55% duty cycle of the
clock is required.
If the bus clock is generated from a PLL, it is recommended to select the oscillator clock rather than the
bus clock due to jitter considerations, especially at the faster CAN bus rates.
626
•
•
•
•
The receive and transmit error counters cannot be written or otherwise manipulated.
All registers which control the configuration of the MSCAN cannot be modified while the MSCAN
is on-line. The MSCAN has to be in Initialization Mode. The corresponding INITRQ/INITAK
handshake bits in the CANCTL0/CANCTL1 registers (see
Register 0
— MSCAN control 1 register (CANCTL1)
— MSCAN bus timing registers 0 and 1 (CANBTR0, CANBTR1)
— MSCAN identifier acceptance control register (CANIDAC)
— MSCAN identifier acceptance registers (CANIDAR0–CANIDAR7)
— MSCAN identifier mask registers (CANIDMR0–CANIDMR7)
The TXCAN is immediately forced to a recessive state when the MSCAN goes into the power
down mode or initialization mode (see
Section 18.4.4.5, “MSCAN Initialization
The MSCAN enable bit (CANE) is writable only once in normal system operation modes, which
provides further protection against inadvertently disabling the MSCAN.
Oscillator Clock
Bus Clock
Protocol Violation Protection
Clock System
shows the structure of the MSCAN clock generation circuitry.
(CANCTL0)”) serve as a lock to protect the following registers:
MC9S12G Family Reference Manual,
Figure 18-43. MSCAN Clocking Scheme
CLKSRC
Section 18.4.5.6, “MSCAN Power Down
Mode”).
CANCLK
MSCAN
CLKSRC
Prescaler
Rev.1.23
(1 .. 64)
Section 18.3.2.1, “MSCAN Control
Time quanta clock (Tq)
Freescale Semiconductor
Mode,” and
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