MC9S12T64 Datasheet, PDF (520/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Fast Background Debug Module (FBDM)
Block Diagram
The block diagrams of the BDM are shown in Figure 99 and Figure 100
below.
HOST
SYSTEM
BKGD
MCU
BDM MODULE
BKGD Drive Control
BKGD Data Output _{16-BIT SHIFT REGISTER}
BKGD Input
SCKBDM / SPIMODE
ENTAG
BDMACT
TRACE
INSTRUCTION DECODE
and EXECUTION
BUS INTERFACE
AND
CONTROL LOGIC
ADDRESS
DATA
CLOCKS
SDV
ENBDM
STANDARD BDM FIRMWARE
LOOKUP TABLE
CLKSW
Figure 99 Block Diagram of BDM in Single Wire Mode
HOST _MCU
SYSTEM
SCKBDM
BDM MODULE
BKGD_DOUT 16-BIT SHIFT REGISTER
BKGD_IND
SCK
SPIMODE
ENTAG
BDMACT
TRACE
INSTRUCTION DECODE
and EXECUTION
BUS INTERFACE
AND
CONTROL LOGIC
SDV
ENBDM
STANDARD BDM FIRMWARE
LOOKUP TABLE
CLKSW
Figure 100 Block Diagram of BDM in SPI Mode
MC9S12T64Revision 1.1.1
Fast Background Debug Module (FBDM)
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ADDRESS
DATA
CLOCKS