MC9S12UF32PB Freescale Semiconductor, MC9S12UF32PB Datasheet - Page 84

• Manufacturer Part Number: MC9S12UF32PB
• Description: IC MCU 32K FLASH 30MHZ 64LQFP
• Manufacturer: Freescale Semiconductor
• Series: HCS12r

Specifications of MC9S12UF32PB

• Core Processor: HCS12
• Core Size: 16-Bit
• Speed: 30MHz
• Connectivity: ATA, Compact Flash, EBI/EMI, Memory Stick, MMC, SCI, SD, Smart Media, USB
• Peripherals: POR, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 3.5K x 8
• Voltage - Supply (vcc/vdd): 2.25 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

System on a Chip Guide — 9S12UF32DGV1/D V01.05
on-chip serial ports. After the backdoor sequence has been correctly matched, the microcontroller will be
unsecured, and all Flash commands will be enabled and the Flash security byte can be programmed to the
unsecure state, if desired.
Please note that if the system goes through a reset condition prior to successful configuration of unsecured
mode the system will reset back into secured mode operation.
4.4.3.2 Unsecuring the Microcontroller (full FLASH erase)
In order to unsecure the microcontroller, the internal FLASH must be erased. This can be done through an
external program in expanded mode.
Once the user has erased the FLASH, the part can be reset into special single chip mode This invokes a
program that verifies the erasure of the internal FLASH. 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.
4.5 Low Power Modes
There are two low power modes available on the MC9S12UF32: Stop and Wait
Please see Table A-8 for device operating characteristics in Stop and Wait modes. Consult the CRG_U
Block Guide and the respective Block Guide for information on the module behavior in Stop and Wait
Mode.
4.5.1 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.
4.5.2 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 data bus) will be fully static. All peripherals stay
active. So, for example, data can still be transferred from ATA5HC to USB via IQUE. For further power
consumption, the peripherals can individually turn off their local clocks.
4.5.3 Run
Although this is not a low power mode, unused peripheral modules should not be enabled in order to save
power.
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