MC912D60CCPVE Freescale Semiconductor, MC912D60CCPVE Datasheet - Page 143

IC MCU 16BIT 112-LQFP

MC912D60CCPVE

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

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

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11.6 Limp-Home and Fast STOP Recovery modes
11.6.1 Clock Loss during Normal Operation
MC68HC912D60A — Rev. 3.1
Freescale Semiconductor
If the crystal frequency is not available due to a crystal failure or a long
crystal start-up time, the MCU system clock can be supplied by the VCO
at its minimum operating frequency, f
called Limp-Home Mode and is only available when the VDDPLL supply
voltage is at VDD level (i.e. power supply for the PLL module is present).
Upon power-up, the ability of the system to start in Limp-Home Mode is
restricted to normal MCU modes only.
The Clock Monitor circuit (see section Clock Monitor) can detect the loss
of EXTALi, the external clock input signal, regardless of whether this
signal is used as the source for MCU clocks or as the PLL reference
clock. The clock monitor control bits, CME and FCME, are used to
enable or disable external clock detection.
A missing external clock may occur in the three following instances:
The ‘no limp-home mode’ bit, NOLHM, determines how the MCU
responds to an external clock loss in this case.
With limp home mode disabled (NOLHM bit set) and the clock monitor
enabled (CME or FCME bits set), on a loss of clock the MCU is reset via
the clock monitor reset vector. A latch in the PLL control section prevents
the chip exiting reset in Limp Home Mode (this is required as the NOLHM
bit gets cleared by reset). Only external clock activity can bring the MCU
out from this reset state. Once reset has been exited, the latch is cleared
and another session, with or without Limp Home Mode enabled, can
take place. This is the same behavior as standard M68HC12 circuits
without PLL or operation with VDDPLL at VSS level.
With limp home mode enabled (NOLHM bit cleared) and the clock
monitor enabled (CME or FCME bits set), on a loss of clock, the PLL
During normal clock operation.
At Power-On Reset.
In the STOP exit sequence
Clock Functions
Limp-Home and Fast STOP Recovery modes
VCOMIN
. This mode of operation is
Clock Functions
Technical Data
143

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