Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Uživatelský manuál stáhnout pdf (Strana 23)

MAXQ Family User’s Guide:

MAXQ2010 Supplement

2-11

Figure 2-7. External Reset Timing

Table 2-3. System Power-Management Registers

CLOCK

RST

RESET SAMPLING

INTERNAL RESET

FIRST

INSTRUCTION

FETCH

CKCN M8[0Eh] [1:0]—CD[1:0]

00: System clock = high-frequency clock divided by 1.

01: System clock = high-frequency clock divided by 2.

10: System clock = high-frequency clock divided by 4.

11: System clock = high-frequency clock divided by 8.

CKCN M8[0Eh] 2—PMME

0: System clock is determined by the settings of CD[1:0].

1: System clock = high-frequency clock divided by 256.

CKCN M8[0Eh] 3—SWB

When set to 1, enables automatic switchback from PMM (divide-by-256

mode) to normal clock-divide mode under certain conditions.

CKCN M8[0Eh] 4—STOP When set to 1, causes the processor to enter stop mode.

PWCN M0[0Fh] 0—FLLEN When set to 1, enables the FLL and causes it to lock to the 32kHz input.

PWCN M0[0Fh] 1—FLOCK

0: FLL is disabled or warming up.

1: FLL is enabled and locked to the 32kHz input.

PWCN M0[0Fh] 2—X32D When set to 1, disables the 32kHz clock source.

PWCN M0[0Fh] 3—X32KRDY

Read-only status bit; when 1, indicates that the 32kHz clock is ready for

use.

PWCN M0[0Fh] 4—HFXD

0: Enables the high-frequency oscillator.

1: Disables the high-frequency oscillator, allowing an external clock to be

provided at HFXIN.

PWCN M0[0Fh] 5—X32KBYP

0: Enables the internal 32kHz oscillator.

1: Disables the internal 32kHz oscillator, allowing an external clock to be

provided at 32KIN.

PWCN M0[0Fh] 6—REGEN

0: Internal regulator is shut down during stop mode.

1: Internal regulator remains powered on during stop mode.

PWCN M0[0Fh] 7—BOD

0: Brownout detection remains enabled during stop mode.

1: Brownout detection is enabled during stop mode.

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 146 147

Komentáře k této Příručce

Žádné komentáře

Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement Uživatelský manuál Strana 23

Komentáře k této Příručce

Související produkty a manuály pro Hardware Maxim-integrated MAXQ Family Users Guide: MAXQ2010 Supplement