Datasheet

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MC68HC912DT128A — Rev 4.0 Technical Data
MOTOROLA Development Support 411
20.4.5.3 SHIFTER
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)
20.4.5.4 ADDRESS
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)
SHIFTER — BDM Shift Register – High Byte $FF02
BIT 15 14 13 12 11 10 9 BIT 8
S15 S14 S13 S12 S11 S10 S9 S8
RESET:
XXXXXXXX
SHIFTER — BDM Shift Register – Low Byte $FF03
BIT 7654321BIT 0
S7 S6 S5 S4 S3 S2 S1 S0
RESET:
XXXXXXXX
ADDRESS — BDM Address Register – High Byte $FF04
BIT 15 14 13 12 11 10 9 BIT 8
A15 A14 A13 A12 A11 A10 A9 A8
RESET:
XXXXXXXX
ADDRESS — BDM Address Register – High Byte $FF05
BIT 7654321BIT 0
A7 A6 A5 A4 A3 A2 A1 A0
RESET:
XXXXXXXX
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