AtmelReset控制器的特性描述.ppt

RSTC 1 Reset Controller RSTC 2 RSTC Features nManages All Resets of the System, Including -External devices through the NRST pin -Processor reset -Peripheral set reset nBased on Embedded Power_on Reset Cell nReset Source Status -Status of the last reset Either Power-up Reset, Software Reset, User Reset, Watchdog Reset, Brownout Reset nExternal Reset Signal Shaping nControls and Reports Brownout Detection RSTC 3 RSTC Block Diagram RSTC 4 Dependencies nAfter reset -The user reset is disabled, set bit URSTEN in RSTC_MR at 1 to enable it -The Watchdog reset is enabled by default and with a period set to a maximum, reset bit WDRSTEN in WDT_MR to disable it nAt factory -The brownout detection is disabled, GPNVM bit 0 set to 0 -The brownout reset is disabled, GPNVM bit 1 is set to 0 RSTC 5 NRST Manager nURSTEN -Disable the User Reset trigger when=0 nURSTS -Set to 1 when pin NRST is asserted -Read RSTC_SR to clear nNRSTL -Read the level of the pin NRST at any time nURSTIEN -Generate an interrupt instead of a reset when=1 nERSTL -Define the assertion duration of nrst_out RSTC 6 Brownout Manager nBODSTS -Set to 1 when the brownout is detected -Read RSTC_SR to clear nBODIEN -Generate an interrupt instead of a reset when=1 RSTC 7 Power-up Sequence RSTC 8 User Reset RSTC 9 Brownout Reset RSTC 10 Software Reset RSTC 11 Watchdog Reset RSTC 12 RSTC Mode Register RSTC_MR nUser Reset Enable nUser Reset Interrupt Enable nBrownout Detection Interrupt Enable nExternal Reset Length nPassword RSTC 13 RSTC Control Register RSTC_CR nProcessor Reset nPeripheral Reset nExternal Reset nPassword RSTC 14 RSTC Status Register RSTC_SR nUser Reset Status nBrownout Detection Status nReset type nNRST Pin Level nSoftware Reset Command in Progress RSTC 15 RSTC Summary nManages All Resets of the System nThe user reset is disabled after