Cypress FM4 Series - Reset Sequence

CHAPTER 4: Resets
FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E 169
3.3 Reset Sequence
This family initiates the program and hardware operations starting with the initial state when a reset factor
is cleared.
This family of operations starting with the reset and ending with the initiation of the operations is called a
reset sequence.
The following explains a reset sequence.
State Transition Diagram for Resets
The following diagram shows a transition of reset states. The detailed operations are given in the
following sections "3.4 Operations after Resets are Cleared".
Power on
Generate reset
factor
PONR
Issue device internal reset
Clear reset factor
Run mode
Generate reset
factor
INITX, LVDH
Generate reset factor
SWDGR, HWDGR,
CSVR, FCSR, DSTR
Determinie operation mode
Reset vector fetch
Start program
SRST
Wait time required until oscillation of high-speed CR has become stable, etc.-
Initialize all circuits
Initialize the range of
reset for each reset
factor factor factor
Clear device.internal reset
Generate reset
factor
Clear reset factor
Clear reset factor Clear reset factor
SWDGR, HWDGR
CSVR, FCSR, DSTR
Initialize the range of
reset for each reset
Initialize the range of
reset for each reset
PONR
INITX, LVDH
SRST