MPC5604BC datasheet(68/109 Pages) NXP

68 / 109 page

MPC5604B/C Microcontroller Data Sheet, Rev. 15

Package pinouts and signal descriptions

NXP Semiconductors

Figure 18. Slow external crystal oscillator (32 kHz) timing diagram

2.23

FMPLL electrical characteristics

The device provides a frequency-modulated phase-locked loop (FMPLL) module to generate a fast system

clock from the main oscillator driver.

2 This is the recommended range of load capacitance at OSC32K_XTAL and OSC32K_EXTAL with respect to

ground. It includes all the parasitics due to board traces, crystal and package.

3 Maximum ESR (R

m) of the crystal is 50 kΩ

4 C0 includes a parasitic capacitance of 2.0 pF between OSC32K_XTAL and OSC32K_EXTAL pins

Table 39. Slow external crystal oscillator (32 kHz) electrical characteristics

Symbol

Parameter

Conditions1

1 V

DD = 3.3 V ± 10% / 5.0 V ± 10%, TA = −40 to 125 °C, unless otherwise specified. Values are specified for no

neighbor GPIO pin activity. If oscillator is enabled (OSC32K_XTAL and OSC32K_EXTAL pins), neighboring pins

should not toggle.

Value

Unit

Min

Typ

Max

fSXOSC

SR — Slow external crystal oscillator frequency

—

32.768

kHz

VSXOSC

CC T Oscillation amplitude

—

2.1

—

ISXOSCBIAS CC T Oscillation bias current

—

2.5

—

µA

ISXOSC

CC T Slow external crystal oscillator consumption

—

µA

TSXOSCSU CC T Slow external crystal oscillator start-up time

—

2 Start-up time has been measured with EPSON TOYOCOM MC306 crystal. Variation may be seen with other crystal.

OSCON bit (OSC_CTL register)

TSXOSCSU

VOSC32K_XTAL

VSXOSC

valid internal clock

90%

10%

1/fSXOSC

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