MC912DG128A Motorola, MC912DG128A Datasheet - Page 84
MC912DG128A
Manufacturer Part Number
MC912DG128A
Description
Microcontrollers
Manufacturer
Motorola
Datasheet
1.MC912DG128A.pdf
(404 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC912DG128ACPV
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Part Number:
MC912DG128ACPV
Manufacturer:
FREE
Quantity:
20 000
Part Number:
MC912DG128ACPV 5K91D
Manufacturer:
FREESCALE
Quantity:
20 000
Company:
Part Number:
MC912DG128ACPVE
Manufacturer:
MICREL
Quantity:
9 982
Company:
Part Number:
MC912DG128ACPVE
Manufacturer:
FREESCALE
Quantity:
1 200
Company:
Part Number:
MC912DG128ACPVE
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC912DG128ACPVER
Manufacturer:
STM
Quantity:
1 244
Company:
Part Number:
MC912DG128ACPVER
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
Company:
Part Number:
MC912DG128AMPV
Manufacturer:
AD
Quantity:
16
Company:
Part Number:
MC912DG128AMPVE
Manufacturer:
FREESCALE
Quantity:
2 902
- Current page: 84 of 404
- Download datasheet (3Mb)
Registers
Bus Control and Input/Output
MC68HC912DT128A Rev 2.0
84
Not all registers are visible in the MC68HC912DT128A memory map
under certain conditions. In special peripheral mode the first 16 registers
associated with bus expansion are removed from the memory map.
In expanded modes, some or all of port A, port B, and port E are used
for expansion buses and control signals. In order to allow emulation of
the single-chip functions of these ports, some of these registers must be
rebuilt in an external port replacement unit. In any expanded mode, port
A, and port B, are used for address and data lines so registers for these
ports, as well as the data direction registers for these ports, are removed
from the on-chip memory map and become external accesses.
In any expanded mode, port E pins may be needed for bus control (e.g.,
ECLK, R/W). To regain the single-chip functions of port E, the emulate
port E (EME) control bit in the MODE register may be set. In this special
case of expanded mode and EME set, PORTE and DDRE registers are
removed from the on-chip memory map and become external accesses
so port E may be rebuilt externally.
LSTRB
1
0
1
0
0
1
0
1
Bus Control and Input/Output
Table 16 Access Type vs. Bus Control Pins
A0
0
1
0
1
0
1
0
1
R/W
1
1
0
0
1
1
0
0
16-bit write to an even address
16-bit read of an even address
16-bit write to an odd address
8-bit write of an even address
16-bit read of an odd address
8-bit read of an even address
8-bit write of an odd address
8-bit read of an odd address
(low/high data swapped)
(low/high data swapped)
Type of Access
MOTOROLA
2--bus
Related parts for MC912DG128A
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Motorola, Inc [VOLTAGE REGULATOR]
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
3N2046367254 MOTOROLA SC (XSTRS/R F)
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
MOTOROLA POWERPC 603e MICROPROCESSOR
Manufacturer:
Motorola
Part Number:
Description:
Motorola Semiconductor Datasheet Library
Manufacturer:
Motorola
Part Number:
Description:
SWITCHMODE Schottky Power Rectifier(POWERTAP III Package)
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
SWITCHMODE Schottky Power Rectifirer
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Search -----> MTE53N50E
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
Hybrid Power Module
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
SCHOTTKY BARRIER RECTIFIER 200 AMPERES 60 VOLT
Manufacturer:
Motorola
Datasheet:
Part Number:
Description:
NPN SILICON POWER DARLINGTON TRANSISTOR
Manufacturer:
Motorola
Datasheet: