Signal Descriptions
MPC561/MPC563 Reference Manual, Rev. 1.2
2-30
Freescale Semiconductor
Figure 2-4. Debug Mode Selection (JTAG)
2.5.2
BDM Mode Selection
The MPC561/MPC563 has a 10 pin BDM port. See
for BDM mode selection.
The BDM mode is entered by the following sequence of events:
•
Hold DSCK high at reset negation (SRESET)
•
Configure DSDI to select BDM clock mode, within 8 clocks of reset negation
BDM mode is exited by:
•
Reset the device by asserting PORESET/TRST or HRESET
Figure 2-5. Debug Mode Selection (BDM)
2.5.3
Nexus Mode Selection
The READI module signals support the Nexus (IEEE-ISTO 5001-1999) auxiliary port interface for debug.
There are two modes available: full port mode and reduced port mode. Reduced port mode allows for a 1
bit input stream and a 2 bit output stream. Full port mode allows for a 2-bit input stream and an 8-bit output
stream. If MDI0 is held high when Nexus mode is enabled, full port mode will be used during Nexus
debug. If MDI0 is held low when Nexus mode is enabled, reduced port mode will be used. See
for Nexus mode selection.
The Nexus interface is entered by the following sequence of events:
•
Hold JCOMP/RSTI low while negating PORESET/TRST
•
Hold TMS/EVTI low to enable Nexus mode and configure TDI/DSDI/MDI0 for full or reduced
port mode. Both of these should be done at least 4 clocks before driving JCOMP/RSTI high
PORESET/TRST
JCOMP/RSTI
JTAG Config
JTAG On
JTAG Disabled
T
SRESET
JCOMP/RSTI
BDM Enable
T
DSCK
DSDI
TMS/EVTI
(low)
(low)
Configure BDM
Enable Nexus
BDM On
Nexus Off
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...