MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 81
MC68HC12
Manufacturer Part Number
MC68HC12
Description
The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC12.pdf
(478 pages)
- Current page: 81 of 478
- Download datasheet (3Mb)
5.3.2 Special Operating Modes
MC68HC912DT128A — Rev 4.0
MOTOROLA
There are three special operating modes that correspond to normal
operating modes. These operating modes are commonly used in factory
testing and system development. In addition, there is a special
peripheral mode, in which an external master, such as an I.C. tester, can
control the on-chip peripherals.
Normal Expanded Narrow Mode — This is a normal mode of
operation in which the expanded bus is present with an 8-bit data
bus. Ports A and B are used for the16-bit address bus. Port A is
used as the data bus, multiplexed with addresses. In this mode,
16-bit data is presented one byte at a time, the high byte followed
by the low byte. The address is automatically incremented on the
second cycle.
Special Single-Chip Mode — This mode can be used to force the
MCU to active BDM mode to allow system debug through the
BKGD pin. There are no external address and data buses in this
mode. The MCU operates as a stand-alone device and all
program and data space are on-chip. External port pins can be
used for general-purpose I/O.
Special Expanded Wide Mode — This mode can be used for
emulation of normal expanded wide mode and emulation of
normal single-chip mode. Ports A and B are used for the 16-bit
multiplexed address/data bus.
Special Expanded Narrow Mode — This mode can be used for
emulation of normal expanded narrow mode. Ports A and B are
used for the16-bit address bus. Port A is used as the data bus,
multiplexed with addresses. In this mode, 16-bit data is presented
one byte at a time, the high byte followed by the low byte. The
address is automatically incremented on the second cycle.
Special Peripheral Mode — The CPU is not active in this mode.
An external master can control on-chip peripherals for testing
purposes. It is not possible to change to or from this mode without
going through reset. Background debugging should not be used
Operating Modes
Operating Modes
Operating Modes
Technical Data
81
Related parts for MC68HC12
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
6367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
MC1494LMotorola, Inc [MONOLITHIC FOUR-QUADRANT MULTIPLIER]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC1466LMotorola, Inc [PRECISION WIDE RANGE VOLTAGE AND CURRENT REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MC145532DWMotorola, Inc [ADPCM Transcoder]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Silicon Controlled Rectifiers
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF Power Field Effect Transistors N-Channel Enhancement-Mode Lateral MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTORS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
LATERAL N-CHANNEL BROADBAND RF POWER MOSFETs
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF POWER FIELD EFFECT TRANSISTOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
RF LOW POWER TRANSISTOR NPN SILICON
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
PLASTIC SURFACE MOUNT ZENER DIODES 1.5 WATTS 3.3-68 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
OVERVOLTAGE TRANSIENT SUPPRESSOR
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET 15 AMPERES 60 VOLTS
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet:
Part Number:
Description:
TMOS POWER FET LOGIC LEVEL 19 AMPERES 30 VOLTS RDS(on) = 0.099 OHM
Manufacturer:
MOTOROLA [Motorola, Inc]
Datasheet: