Datasheet

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
DS60001320B-page 694 Preliminary  2015 Microchip Technology Inc.
A.4 Resets
The PIC32MZ EF family of devices has updated the
resets modules to incorporate the new handling of NMI
resets from the WDT, DMT, and the FSCM. In addition,
some bits have been moved, as summarized in
Table A-5.
A.5 USB
The PIC32MZ EF family of devices has a new Hi-
Speed USB module, which requires the updated USB
stack from Microchip. In addition, the USB PLL was
also updated. See Section
A.1 “Oscillator and PLL
Configuration” for more information and
Table A-6
for a list of additional differences.
TABLE A-5: RESET DIFFERENCES
PIC32MX5XX/6XX/7XX Feature PIC32MZ EF Feature
Power Reset
The VREGS bit, which controls whether the internal regulator is
enabled in Sleep mode, has been moved from RCON in
PIC32MX5XX/6XX/7XX devices to a new PWRCON register in
PIC32MZ EF devices.
VREGS (RCON<8>)
1 = Regulator is enabled and is on during Sleep mode
0 = Regulator is disabled and is off during Sleep mode
VREGS (PWRCON<0>)
1 = Voltage regulator will remain active during Sleep
0 = Voltage regulator will go to Stand-by mode during Sleep
Watchdog Timer Reset
On PIC32MX devices, a WDT expiration immediately triggers a
device reset.
On PIC32MZ EF devices, the WDT expiration now causes a NMI.
The WDTO bit in RNMICON indicates that the WDT caused the
NMI. A new timer, NMICNT, runs when the WDT NMI is triggered,
and if it expires, the device is reset.
WDT expiration immediately causes a device reset. WDT expiration causes a NMI, which can then trigger the
device reset.
WDTO (RNMICON<24>)
1 = WDT time-out has occurred and caused a NMI
0 = WDT time-out has not occurred
NMICNT<7:0> (RNMICON<7:0>)
TABLE A-6: USB DIFFERENCES
PIC32MX5XX/6XX/7XX Feature PIC32MZ EF Feature
Debug Mode
On PIC32MX devices, when stopping on a breakpoint during
debugging, the USB module can be configured to stop or
continue execution from the Freeze Peripherals dialog in MPLAB
X IDE.
On PIC32MZ EF devices, the USB module continues operating
when stopping on a breakpoint during debugging.
VBUSON Pin
PIC32MX devices feature a VBUSON pin for controlling the
external transceiver power supply.
On PIC32MZ EF devices, the VBUSON pin is not available. A port
pin can be used to achieve the same functionality.