MC912D60CCPVE Freescale Semiconductor, MC912D60CCPVE Datasheet - Page 150

• Manufacturer Part Number: MC912D60CCPVE
• Description: IC MCU 16BIT 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC912D60CCPVE

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: CAN, MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x8/10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Processor Series: HC912D
• Core: HC12
• Data Bus Width: 16 bit
• Data Ram Size: 2 KB
• Interface Type: CAN, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 86
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWHCS12
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Clock Functions
11.6.5 Executing the STOP instruction without Limp Home mode, clock monitor enabled
11.6.6 STOP exit in Limp Home mode with Delay
Technical Data
150
CAUTION:
(NOLHM=1, CME=1, DLY=X)
If the NOLHM bit and the CME (or FCME) bits are set, a clock monitor
failure is detected when a STOP instruction is executed and the MCU
resets via the clock monitor reset vector.
(NOLHM=0, CME=X, DLY=1)
If the NOLHM bit is cleared, then the CME (or FCME) bit is masked when
a STOP instruction is executed to prevent a clock monitor failure. When
coming out of STOP mode, the MCU goes into limp-home mode where
CME and FCME signals are asserted.
When using a crystal oscillator, a normal STOP exit sequence requires
the DLY bit to be set to allow for the crystal stabilization period.
With the 13-stage counter clocked by the VCO (at f
delay of 4096 XCLK cycles at the limp-home frequency, if the clock
monitor indicates the presence of an external clock, the limp-home mode
is de-asserted and the MCU exits STOP normally using EXTALi clock.
Where the crystal start-up time is longer than the initial count of 4096
XCLK cycles, or in the absence of an external clock, the MCU recovers
from STOP following the 4096 count in limp-home mode with both the
LHOME flag set and the LHIF limp-home interrupt request set to indicate
it is not operating at the desired frequency. Each time the 13-stage
counter reaches a count of 4096 XCLK cycles, a check of the clock
monitor status is performed.
When the presence of an external clock is detected, limp-home mode is
exited and the LHOME flag is cleared. This sets the limp-home interrupt
flag and if enabled by the LHIE bit, the limp-home mode interrupt is
requested.
The clock monitor circuit can be misled by EXTALi clock into reporting a
good signal before it has fully stabilised. Under these conditions,
Clock Functions
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor
VCOMIN
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