MC912DG128A Motorola, MC912DG128A Datasheet - Page 342

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

SHIFTER — BDM Shift Register – High Byte
SHIFTER — BDM Shift Register – Low Byte
ADDRESS — BDM Address Register – High Byte
ADDRESS — BDM Address Register – High Byte
SHIFTER
ADDRESS
Development Support
MC68HC912DT128A Rev 2.0
342
RESET:
RESET:
RESET:
RESET:
BIT 15
BIT 15
BIT 7
BIT 7
S15
A15
S7
A7
X
X
X
X
S14
A14
S6
A6
14
14
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
A5
13
13
X
X
X
X
5
5
Development Support
S12
A12
S4
A4
12
12
X
4
X
X
4
X
S11
A11
11
S3
11
A3
X
X
X
X
3
3
S10
A10
S2
A2
10
10
X
X
X
X
2
2
S9
S1
A9
A1
X
X
X
X
9
1
9
1
BIT 0
BIT 8
BIT 0
BIT 8
S8
S0
A8
A0
X
X
X
X
MOTOROLA
$FF02
$FF03
$FF04
$FF05
16-dev