Clock, Reset, and Power Control (CRP)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
5-23
Preliminary
Figure 5-16. Stop Mode Transition Diagram (Part 2)
5.3.3.1
Pad Keeper Control
The pad keeper blocks are controlled by the CRP, but are not contained within it. The pad keepers maintain
output pin states through the sleep and stop modes for pins configured as outputs in the SIU PCR registers.
Pins that are to be used for wakeup from sleep/stop modes, must have the IBE enabled in the SIU PCR
prior to sleep/stop entry. If a pullup/down is enabled on an input pin prior to entry into sleep or stop mode,
it will remain enabled during the low-power mode.
13
Debug
Enabled
?
T
F
14
15
Mode Transition: STOP
RUN
- Disable isolation
and pad keepers
Assert TDO Pin
- Start Clocks
wait NPC PCR
sleep sync bit set
- Negate TDO Pin
- Clear NPC PCR
Sleep Sync Bit
16
wait 10 clks, then
negate FSM stop flag
- Capture stop flag
State 12
Go to INIT
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