Clock Control Of Low Power Tia Chop, Watchdog, And Wake-Up Timers Register; Key Protection For Osccon Register; Oscillator Control Register - Analog Devices ADuCM355 Hardware Reference Manual

ADuCM355 Hardware Reference Manual

CLOCK CONTROL OF LOW POWER TIA CHOP, WATCHDOG, AND WAKE-UP TIMERS REGISTER

Address: 0x400C0A70, Reset: 0x0000, Name: CLKEN0
Table 16. Bit Descriptions for CLKEN0
Bits Bit Name
[15:3] Reserved
2 TIACHPDIS
1 SLPWUTDIS
0 WDTDIS

KEY PROTECTION FOR OSCCON REGISTER

Address: 0x400C0A0C, Reset: 0x0000, Name: OSCKEY
Table 17. Bit Descriptions for OSCKEY
Bits Bit Name Settings
[15:0] OSCKEY 0xCB14

OSCILLATOR CONTROL REGISTER

Address: 0x400C0A10, Reset: 0x0303, Name: OSCCON
The OSCCON register is key protected. To unlock this protection, write 0xCB14 to the OSCKEY register before writing to the OSCCON
register. A write to any other register before writing to the OSCCON register returns the protection to the lock state.
Table 18. Bit Descriptions for OSCCON
Bits Bit Name Settings
[15:11] Reserved
10 HFXTALOK
9 HFOSCOK
8 LFOSCOK
[7:3] Reserved
2 HFXTALEN
Settings Description
Reserved.
TIA Chop Clock Disable.
0 Turn on TIA chop clock.
1 Turn off TIA chop clock.
Sleep and Wake-Up Timer Clock Disable.
0 Turn on sleep wake-up timer clock.
1 Turn off sleep wake-up timer clock.
Watchdog Timer Clock Disable.
0 Turn on watchdog timer clock.
1 Turn off watchdog timer clock.
Description
Oscillator Control Key Register. The OSCCON register is key-protected. Write 0xCB14 to
OSCKEY before accessing the OSCCON register. A write to any other register before
writing to OSCCON returns the protection to the lock state.
Description
Reserved.
Status of HFXTAL Oscillator. This bit indicates when the oscillator is stable after it is
enabled. This bit is not a monitor and does not indicate a subsequent loss of
stability.
0 Oscillator is not yet stable or is disabled.
1 Oscillator is enabled, stable, and ready for use.
Status of High Frequency Oscillator. This bit indicates when the oscillator is stable after it
is enabled. This bit is not a monitor and does not indicate a subsequent loss of stability.
0 Oscillator is not yet stable or is disabled.
1 Oscillator is enabled, stable, and ready for use.
Status of Low Frequency Oscillator. This bit indicates when the oscillator is stable after it is
enabled. This bit is not a monitor and does not indicate a subsequent loss of stability.
0 Oscillator is not yet stable or is disabled.
1 Oscillator is enabled, stable, and ready for use.
Reserved.
HFXTAL Oscillator Enable. This bit is used to enable or disable the oscillator. The
oscillator must be stable before use. This bit must be set before the SYSRESETREQ
system reset can be initiated.
0 The HFXTAL oscillator is disabled and placed in a low power state.
1 The HFXTAL oscillator is enabled.
Rev. B | Page 23 of 312
UG-1262
Reset Access
0x0 R
0x1 R/W
0x0 R/W
0x0 R/W
Reset Access
0x0 R/W
Reset Access
0x0 R
0x0 R
0x1 R
0x1 R
0x0 R
0x0 R/W