mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 76
mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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Operating Modes
5.3.1 Normal Operating Modes
Technical Data
76
BKGD
1
1
1
1
0
0
0
0
There are two basic types of operating modes:
For operation above 105 C, the MC68HC912DG128 (M temperature
range product only) is limited to single chip modes of operation.
A system development and debug feature, background debug mode
(BDM), is available in all modes. In special single-chip mode, BDM is
active immediately after reset.
These modes provide three operating configurations. Background
debugging is available in all three modes, but must first be enabled for
some operations by means of a BDM background command, then
activated.
Freescale Semiconductor, Inc.
MODB
For More Information On This Product,
0
0
1
1
0
0
1
1
Normal modes — some registers and bits are protected
against accidental changes.
Special modes — allow greater access to protected control
registers and bits for special purposes such as testing and
emulation.
MODA
Go to: www.freescale.com
0
1
0
1
0
1
0
1
Operating Modes
Table 5-1. Mode Selection
Normal Expanded Narrow
Special Expanded Narrow
Special Expanded Wide
Normal Expanded Wide
Reserved (Forced to
Special Single Chip
Normal Single Chip
Special Peripheral
Peripheral)
Mode
MC68HC912DG128 — Rev 3.0
ADDR/DATA
ADDR/DATA
ADDR/DATA
ADDR/DATA
ADDR/DATA
G.P. I/O
G.P. I/O
Port A
—
ADDR/DATA
ADDR/DATA
ADDR/DATA
MOTOROLA
G.P. I/O
G.P. I/O
Port B
ADDR
ADDR
—
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