MC912DG128ACPV Freescale Semiconductor, MC912DG128ACPV Datasheet - Page 97

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MC912DG128ACPV

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

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

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MC68HC912DT128A — Rev 4.0
MOTOROLA
NDRF — Narrow Data Bus for Register-Following Map Space
RFSTR1, RFSTR0 — Register Following Stretch
EXSTR1, EXSTR0 — External Access Stretch
This bit enables a narrow bus feature for the 1K byte Register-
Following Map. This is useful for accessing 8-bit peripherals and
allows 8-bit and 16-bit external memory devices to be mixed in a
system. In Expanded Narrow (eight bit) modes, Single Chip Modes,
and Peripheral mode, this bit has no effect.
The Register-Following space is mapped from $0400 to $07FF after
reset, which is next to the register map. If the registers are moved this
space follows.
This two bit field determines the amount of clock stretch on accesses
to the 1K byte Register Following Map. It is valid regardless of the
state of the NDRF bit. In Single Chip and Peripheral Modes this bit
has no meaning or effect.
This two bit field determines the amount of clock stretch on accesses
to an external address space. In Single Chip and Peripheral Modes
this bit has no meaning or effect.
Freescale Semiconductor, Inc.
For More Information On This Product,
0 = Makes Register-Following MAP space act as a full 16 bit data
1 = Makes the Register-Following MAP space act the same as an
bus.
8 bit only external data bus (data only goes through port A
externally).
Go to: www.freescale.com
RFSTR1
Table 6-5. RFSTR Stretch Bit Definition
Resource Mapping
0
0
1
1
RFSTR0
0
1
0
1
Miscellaneous System Control Register
Number of E Clocks
Stretched
0
1
2
3
Resource Mapping
Technical Data
97

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