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Table 6-3. Flash Option Register (FTFA_FOPT) definition
(continued)
Bit
Num
Field
Value
Definition
setting of this option and releasing the reset function on the pin. When the RESET
pin is disabled and configured as a GPIO output, it operates as a pseudo open
drain output.
This bit is preserved through system resets and low-power modes. When
RESET_b pin function is disabled, it cannot be used as a source for low-power
mode wake-up.
NOTE: When the reset pin has been disabled and security has been enabled by
means of the FSEC register, a mass erase can be performed only by
setting both the Mass Erase and System Reset Request fields in the
MDM-AP register.
1
RESET_b pin is dedicated. The port is configured with pullup enabled, open drain,
passive filter enabled.
2
NMI_DIS
Enables/disables control for the NMI function.
0
NMI interrupts are always blocked. The associated pin continues to default to
NMI_b pin controls with internal pullup enabled. When NMI_b pin function is
disabled, it cannot be used as a source for low-power mode wake-up.
If the NMI function is not required, either for an interrupt or wake up source, it is
recommended that the NMI function be disabled by clearing NMI_DIS.
1
NMI_b pin/interrupts reset default to enabled.
1
BOOTPIN_OPT
External pin selects boot options
0
Force Boot from ROM if BOOTCFG0 asserted, where BOOTCFG0 is the boot
config function which is muxed with NMI_b pin. RESET_b pin must be enabled
(FOPT[RESET_PIN_CFG] = 1) when this option is selected. NMI_b pin is sampled
at the end of reset (when reset pin negates). If BOOTCFG0 pin is not asserted,
Boot source configured by FOPT[7:6] (BOOTSRC_SEL) bits.
1
Boot source configured by FOPT[7:6] ( BOOTSRC_SEL) bits
4,0
LPBOOT
Controls the reset value of DIVCORE in the SCG_RCCR and SCG_VCCR registers, and
the state of the RUNM field in the SMC_PMCTRL register. Larger divide value selections
produce lower average power consumption during POR, VLLSx recoveries and reset
sequencing and after reset exit. The recovery times are also extended if the FAST_INIT
option is not selected.
00
Core and system clock divider (SCG_VCCR[DIVCORE]) is 0x7 (divide by 8).
Device is configured for VLPR mode on exit from reset.
01
Core and system clock divider (SCG_VCCR[DIVCORE]) is 0x3 (divide by 4).
Device is configured for VLPR mode on exit from reset.
10
Core and system clock divider (SCG_RCCR[DIVCORE]) is 0x1 (divide by 2).
Device is configured for RUN mode on exit from reset.
11
Core and system clock divider (SCG_RCCR[DIVCORE]) is 0x0 (divide by 1).
Device is configured for RUN mode on exit from reset.
Chapter 6 Reset and Boot
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors
131
Содержание K32 L2A Series
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Страница 122: ...Flash Memory Clock K32 L2A Reference Manual Rev 2 01 2020 122 NXP Semiconductors...
Страница 146: ...Module operation in low power modes K32 L2A Reference Manual Rev 2 01 2020 146 NXP Semiconductors...
Страница 158: ...Debug and security K32 L2A Reference Manual Rev 2 01 2020 158 NXP Semiconductors...
Страница 174: ...Module Signal Description Tables K32 L2A Reference Manual Rev 2 01 2020 174 NXP Semiconductors...
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