MC9S12DJ256CPVE Freescale Semiconductor, MC9S12DJ256CPVE Datasheet - Page 73
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MC9S12DJ256CPVE
Manufacturer Part Number
MC9S12DJ256CPVE
Description
IC MCU 256K FLASH 4K EE 112-LQFP
Manufacturer
Freescale Semiconductor
Series
HCS12r
Specifications of MC9S12DJ256CPVE
Core Processor
HCS12
Core Size
16-Bit
Speed
25MHz
Connectivity
CAN, I²C, SCI, SPI
Peripherals
PWM, WDT
Number Of I /o
91
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
12K x 8
Voltage - Supply (vcc/vdd)
2.35 V ~ 5.25 V
Data Converters
A/D 16x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
112-LQFP
Processor Series
S12D
Core
HCS12
Data Bus Width
16 bit
Data Ram Size
12 KB
Interface Type
CAN/I2C/SCI/SPI
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
59
Number Of Timers
8
Operating Supply Voltage
- 0.3 V to + 6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWHCS12
Development Tools By Supplier
M68KIT912DP256
Minimum Operating Temperature
- 40 C
On-chip Adc
2 (8-ch x 10-bit)
Package
112LQFP
Family Name
HCS12
Maximum Speed
25 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC9S12DJ256CPVE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Freescale Semiconductor, Inc.
MC9S12DT128B Device User Guide — V01.09
4.3.3 Unsecuring the Microcontroller
In order to unsecure the microcontroller, the internal FLASH and EEPROM must be erased. This can be
done through an external program in expanded mode.
Once the user has erased the FLASH and EEPROM, the part can be reset into special single chip mode.
This invokes a program that verifies the erasure of the internal FLASH and EEPROM. Once this program
completes, the user can erase and program the FLASH security bits to the unsecured state. This is generally
done through the BDM, but the user could also change to expanded mode (by writing the mode bits
through the BDM) and jumping to an external program (again through BDM commands). Note that if the
part goes through a reset before the security bits are reprogrammed to the unsecure state, the part will be
secured again.
4.4 Low Power Modes
The microcontroller features three main low power modes. Consult the respective Block User Guide for
information on the module behavior in Stop, Pseudo Stop, and Wait Mode. An important source of
information about the clock system is the Clock and Reset Generator User Guide (CRG).
4.4.1 Stop
Executing the CPU STOP instruction stops all clocks and the oscillator thus putting the chip in fully static
mode. Wake up from this mode can be done via reset or external interrupts.
4.4.2 Pseudo Stop
This mode is entered by executing the CPU STOP instruction. In this mode the oscillator is still running
and the Real Time Interrupt (RTI) or Watchdog (COP) sub module can stay active. Other peripherals are
turned off. This mode consumes more current than the full STOP mode, but the wake up time from this
mode is significantly shorter.
4.4.3 Wait
This mode is entered by executing the CPU WAI instruction. In this mode the CPU will not execute
instructions. The internal CPU signals (address and databus) will be fully static. All peripherals stay active.
For further power consumption the peripherals can individually turn off their local clocks.
4.4.4 Run
Although this is not a low power mode, unused peripheral modules should not be enabled in order to save
power.
For More Information On This Product,
Go to: www.freescale.com