Freescale Semiconductor MPC5604B - Functional Description

MPC5604B/C Microcontroller Reference Manual, Rev. 8
Freescale Semiconductor 815
33.7 Functional description
The NDI block is implemented by integrating the following blocks on the MPC5604B:
• Nexus e200z0 development interface (OnCE and Nexus2p subblocks)
• Nexus port controller (NPC) block
• NPC_HNDSHK module
33.7.1 NPC_HNDSHK module
This module enables debug entry/exit across low power modes (Stop, Halt, standby).
The NPC_HNDSHK supports:
• Setting and clearing of the NPC PCR sync bit on low-power mode entry and exit
• Putting the core into debug mode on low-power mode exit
• Generating a falling edge on the JTAG TDO pad on low-power mode exit
On HALT, STOP, or STANDBY mode entry, the MC_ME asserts the lp_mode_entry_req input after the
clock disable process has completed and before the processor enters its halted or stopped state. The mode
transition will then not proceed until the lp_mode_entry_ack output has been asserted. The notification to
the debugger of a low-power mode entry consists of setting the low-power mode handshake bit in the port
control register (read by the debugger) via the lp_sync_in output. The debugger acknowledges that the
transition into a low-power mode may proceed by clearing the low-power mode handshake bit in the port
control register (written by the debugger), which results in the deassertion of the lp_sync_out input.
In anticipation of the low-power mode exit notification, the TDO pad is driven to `1'.
Table 33-10. WT field descriptions
Field Description
0–2
PTS[2:0]
Program Trace Start Control
000 Trigger disabled
001 Use watchpoint #0 (IAC1 from Nexus1).
010 Use watchpoint #1 (IAC2 from Nexus1).
011 Use watchpoint #2 (IAC3 from Nexus1).
100 Use watchpoint #3 (IAC4 from Nexus1).
101 Use watchpoint #4 (DAC1 from Nexus1).
110 Use watchpoint #5 (DAC2 from Nexus1).
111 Use watchpoint #6 or #7 (DCNT1 or DCNT2 from Nexus1).
3–5
PTE[2:0]
Program Trace End Control
000 Trigger disabled
001 Use watchpoint #0 (IAC1 from Nexus1).
010 Use watchpoint #1 (IAC2 from Nexus1).
011 Use watchpoint #2 (IAC3 from Nexus1).
100 Use watchpoint #3 (IAC4 from Nexus1).
101 Use watchpoint #4 (DAC1 from Nexus1).
110 Use watchpoint #5 (DAC2 from Nexus1).
111 Use watchpoint #6 or #7 (DCNT1 or DCNT2 from Nexus1).
12–31 Reserved