MMPF0200Z datasheet(24/118 Pages) NXP

24 / 118 page

Analog Integrated Circuit Device Data



Freescale Semiconductor

PF0200Z

Functional Block Requirements and Behaviors

16 MHz and 32 kHz Clocks

6.1.5

Programming OTP Fuses

The parameters that can be programmed are shown in the TBBOTP registers in the Extended Page 1 of the register map. The

PF0200Z offers ECC, the control registers for which functions are located in Extended Page 2 of the register map. There are ten

banks of twenty-six fuses, each that can be programmed.

6.2

16 MHz and 32 kHz Clocks

There are two clocks: a trimmed 16 MHz, RC oscillator and an untrimmed 32 kHz, RC oscillator. The 16 MHz oscillator is

specified within -8.0/+8.0%. The 32 kHz untrimmed clock is only used in the following conditions:

• VIN < UVDET

• All regulators are in SLEEP mode

• All regulators are in PFM switching mode

A 32 kHz clock, derived from the 16 MHz trimmed clock, is used when accurate timing is needed under the following conditions:

• During start-up, VIN > UVDET

• PWRON_CFG = 1, for power button debounce timing

In addition, when the 16 MHz is active in the ON mode, the debounce times in Table 25 are referenced to the 32 kHz derived

from the 16 MHz clock. The exceptions are the LOWVINI and PWRONI interrupts, which are referenced to the 32 kHz untrimmed

clock.

6.2.1

Clock adjustment

The 16 MHz clock and hence the switching frequency of the regulators, can be adjusted to improve the noise integrity of the

system. By changing the factory trim values of the 16MHz clock, the user may add an offset as small as

3.0% of the nominal

frequency.

Table 14. Source of Start-up Sequence

VDDOTP(V)

TBB_POR FUSE_POR_XOR

Start-up Sequence

None

OTP fuses

TBBOTP registers

1.5

Factory defined

Table 15. 16 MHz Clock Specifications

TA = -40 to 85 °C, VIN = 2.8 to 4.5 V, LICELL = 1.8 to 3.3 V and typical external component values. Typical values are

characterized at VIN = 3.6 V, LICELL = 3.0 V, and 25 °C, unless otherwise noted.

Parameters

Symbol

Min

Typ

Max

Units

Operating Voltage From VIN

VIN16MHz

2.8

–

4.5

16 MHz Clock Frequency

f16MHZ

14.7

17.3

MHz

2.0 MHz Clock Frequency (24)

f2MHZ

1.84

–

2.16

MHz

Notes

24.

2.0 MHz clock is derived from the 16 MHz clock.

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