MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 411
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)
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SHIFTER — BDM Shift Register – High Byte
SHIFTER — BDM Shift Register – Low Byte
ADDRESS — BDM Address Register – High Byte
ADDRESS — BDM Address Register – High Byte
20.4.5.3 SHIFTER
20.4.5.4 ADDRESS
MC68HC912DT128A — Rev 4.0
MOTOROLA
RESET:
RESET:
RESET:
RESET:
BIT 15
BIT 15
BIT 7
BIT 7
S15
A15
S7
A7
X
X
X
X
S14
A14
14
S6
14
A6
X
X
X
X
6
6
This 16-bit shift register contains data being received or transmitted via
the serial interface. It is also used by the BDM firmware for temporary
storage.
Read: all modes (but not normally accessed by users)
Write: all modes (but not normally accessed by users)
This 16-bit address register is temporary storage for BDM hardware and
firmware commands.
Read: all modes (but not normally accessed by users)
Write: only by BDM hardware (state machine)
S13
A13
S5
13
13
A5
X
X
X
X
5
5
Development Support
S12
A12
S4
A4
12
12
X
X
X
X
4
4
S11
A11
S3
A3
11
11
X
X
X
X
3
3
S10
A10
S2
A2
10
10
X
X
X
2
X
2
S9
S1
A9
A1
X
X
X
X
1
9
1
9
Background Debug Mode
Development Support
BIT 0
BIT 8
BIT 0
BIT 8
S8
S0
A8
A0
X
X
X
X
Technical Data
$FF02
$FF03
$FF04
$FF05
411
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