SPRSP93 November 2024 F29H850TU , F29H859TU-Q1
ADVANCE INFORMATION
The Reset Signals table summarizes the various reset signals and their effect on the device.
RESET SOURCE | LPOST | HSM RESET | CPU1 SUBSYSTEM RESET | CPU2 SUBSYSTEM RESET | CPU3 SUBSYSTEM RESET | JTAG/ DEBUG LOGIC RESET |
IOs | XRSn OUTPUT |
---|---|---|---|---|---|---|---|---|
PORESETn_RAW | Yes | Yes | Yes | Yes | Yes | Yes | Hi-Z | Yes |
PORESETn | - | Yes | Yes | Yes | Yes | Yes | Hi-Z | Yes |
XRSn Pin | - | Yes | Yes | Yes | Yes | - | Hi-Z | - |
CPU1.SIMRESET.XRSn | - | Yes | Yes | Yes | Yes | - | Hi-Z | Yes |
CPU1.WDRSn | - | Yes | Yes | Yes | Yes | - | Hi-Z | Yes |
ESM CPU1.NMIWDRSn(1) | - | Yes | Yes | Yes | Yes | - | Hi-Z | Yes |
CPU1.SYSRSn (Debugger Reset) |
- | - | Yes | Yes | Yes | - | Hi-Z | - |
CPU2.WDRSn | - | - | - | Yes | - | - | - | - |
ESM CPU2.NMIWDRSn(1) | - | Yes | Yes | Yes | Yes | - | Hi-Z | Yes |
CPU2.SYSRSn (Debugger Reset) |
- | - | - | Yes | - | - | - | - |
CPU3.WDRSn | - | - | - | - | Yes | - | - | - |
ESM CPU3.NMIWDRSn(1) | - | Yes | Yes | Yes | Yes | - | Hi-Z | Yes |
CPU3.SYSRSn (Debugger Reset) |
- | - | - | - | Yes | - | - | - |
ECAT_RESET_OUT | - | Yes | Yes | Yes | Yes | - | Hi-Z | Yes |
The parameter th(boot-mode) must account for a reset initiated from any of these sources.
See the Resets section of the System Control chapter in the F29H85x and F29P58x Real-Time Microcontrollers Technical Reference Manual.
Some reset sources are internally driven by the device. Some of these sources will drive XRSn low, use this to disable any other devices driving the boot pins. The SCCRESET and debugger reset sources do not drive XRSn; therefore, the pins used for boot mode should not be actively driven by other devices in the system. The boot configuration has a provision for changing the boot pins in OTP.