MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 92

• Manufacturer Part Number: MC912DG128ACPV
• Description: IC MCU 128K FLASH 8MHZ 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC912DG128ACPV

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: CAN, I²C, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 8K 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
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Resource Mapping
6.4 Flash EEPROM mapping through internal Memory Expansion
6.4.1 Program space expansion
Technical Data
92
The Page Index register or PPAGE provides memory management for
the MC68HC912DT128A. PPAGE consists of three bits to indicate
which physical location is active within the windows of the
MC68HC912DT128A. The MC68HC912DT128A has a user’s program
space window, a register space window for Flash module registers, and
a test program space window.
The user’s program page window consists of 16K Flash EEPROM bytes.
One of eight pages is viewed through this window for a total of 128K
accessible Flash EEPROM bytes.
The register space window consists of a 4-byte register block. One of
four pages is viewed through this window for each of the 32K flash
module register blocks of MC68HC912DT128A.
The test mode program page window consists of 32K Flash EEPROM
bytes. One of the four 32K byte arrays is viewed through this window for
a total 128K accessible Flash EEPROM bytes. This window is only
available in special mode for test purposes and replaces the user’s
program page window.
MC68HC912DT128A has a five pin port, port K, for emulation and for
general purpose I/O. Three pins are used to emulate the three page
indices (PPAGE bits) and one pin is used as an emulation chip select.
When these four pins are not used for emulation they serve as general
purpose I/O pins. The fifth port K pin is used as a general purpose I/O
pin.
There are 128K bytes of Flash EEPROM for MC68HC912DT128A. With
a 64K byte address space, the PPAGE register is needed to perform on
chip memory expansion. A program space window of 16K byte pages is
located from $8000 to $BFFF. Three page indices are used to point to
one of eight different 16K byte pages.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
Resource Mapping
MC68HC912DT128A — Rev 4.0
MOTOROLA