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Chapter 14
Power Management Controller (PMC)
14.1 Chip specific power management controller
This device includes a power management controller (PMC) which contains on-chip
regulators for various operational power modes of run, wait, and stop modes. The low
voltage detect (LVD) allows the system to protect against low voltage conditions to
protect memory contents and control MCU system states during supply voltage
variations. The on-chip voltage regulators supply the 1.8 V and 5 V (V
circuitry and I/O logic. The on-chip voltage reference (VREFH ≈ 4.2V), which is
internally connected to ADC reference and 6-bit DAC, provides independent accuracy
reference which does not drop over the full operating voltage even when the operating
voltage is falling.
Over voltage protection(OVP), which allows the voltage over
18 V being detected, is in GDU module.
14.2 Introduction
The power management controller (PMC) module contains four main voltage regulators,
which provide internal power to other analog modules and the MCU from an external DC
source. The nominal output voltage remains steady over the input voltage range of 5.3 V
to 20 V.
PMC also contains the power-on reset (POR), the low voltage detection system (low
voltage reset and low voltage warning), a high-accuracy reference voltage output, a 20
kHz low-power oscillator and an internal temperature monitor.
NXP Semiconductors
NOTE
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
) to internal
DDX
217
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