PIC32MX440F256H-80I Datasheet, PDF (607/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
FIGURE 30-4:
POWER-ON RESET TIMING CHARACTERISTICS
Internal Voltage Regulator Enabled
Clock Sources = (FRC, FRCDIV, FRCDIV16, FRCPLL, EC, ECPLL and LPRC)
VDD
VPOR
Power Up Sequence
(See Note 2)
(TSYSDLY)
SY02
SY00
(TPU)
(See Note 1)
CPU starts fetching code
Internal Voltage Regulator Enabled
Clock Sources = (HS, HSPLL, XT, XTPLL and SOSC)
VDD
VPOR
(TSYSDLY)
SY02
Power Up Sequence
(See Note 2)
SY00
(TPU)
(See Note 1)
SY10
(TOST)
CPU starts fetching code
External VDDCORE Provided
Clock Sources = (FRC, FRCDIV, FRCDIV16, FRCPLL, EC, ECPLL and LPRC)
VDD
VPOR
VDDCORE
Power Up Sequence
(See Note 3)
(TSYSDLY)
SY02
SY01
(TPWRT)
(See Note 1)
CPU starts fetching code
Note 1: The Power Up Period will be extended if the Power Up Sequence completes before the device
exits from BOR (VDD < VDDMIN).
2: Includes Interval Voltage Regulator stabilization delay.
3: Power-Up Timer (PWRT); only active when the Internal Voltage Regulator is disabled
© 2008 Microchip Technology Inc.
Preliminary
DS61143E-page 605