NXP Semiconductors
UM11227
NTM88 family of tire pressure monitor sensors
UM11227 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 6 — 24 April 2020
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Table 174. SIMOTRM register field descriptions
Field Description
7:0
SIMOT
RM[7:0]
SIMOTRM[7:0] — SIM Oscillator Trim
Output of the SIMOTRM[7:0] is directed to ICS to control the temporary setting of the MFO frequency. The
register is loaded after any reset with Flash IFR[31:24] bit contents. This register is writable at any time.
SIMOTRM[7:0] holds the Trim value for the Medium Frequency Oscillator (MFO).
10.23 Power management controller (PMC) module
A low-power CMOS on-chip fixed voltage regulator provides internal power to the MCU
from an external DC source. The nominal output voltage remains steady over the (LV)
1.8 V to 3.6 V input voltage range.
Features of the PMC are described as follows:
• Separate digital (regulated) and analog (referenced to digital) supply outputs.
• No output supply decoupling capacitors required.
• Programmable power saving states
• Real Time Interrupt (RTI) with programmable period using internal oscillator or external
clock.
• Automatic wake-up from power saving states by real-time interrupt
• Available wake-up from power saving states via external input.
• Integrated Power-on Reset (POR).
• Integrated Low Voltage Detect (LVD) with reset (brownout) or interrupt capability.
• Programmable LVD trip points.
• Programmable Low Voltage Warning (LVW) indicator.
• Voltage output indicator.
• Buffered band gap reference voltage output
• Factory programmed trim for band gap reference for regulator and LVD.
• No integrated short circuit or thermal protection.
• RTI clock and counter output signals for use by other modules on-chip.
• Optional High Voltage Warning (HVW) with interrupt for over-voltage detection.
• Free-running counter (0.5 ms counter interval nominally) that can operate in all run and
stop modes (start, hold, and reset operations)
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