ACS_XTAL32K_CTRL

Bit Field

Read/Write

Field Name

Description

26

W

XTAL_N_OK_RESET

Reset Xtal not ok sticky flag

25

R

XTAL_N_OK

Xtal not ready sticky flag

24

R

READY

Xtal ready status

18

RW

XIN_CAP_BYPASS_EN

Switch to bypass the added XIN serial cap to reduce the leakage

17

RW

EN_AMPL_CTRL

Xtal enable amplitude control (regulation)

16

RW

FORCE_READY

Xtal bypass the ready detector

13:8

RW

CLOAD_TRIM

Xtal load capacitance configuration

7:4

RW

ITRIM

Xtal current trimming

1

RW

IBOOST

Xtal current boosting (4x)

0

RW

ENABLE

Enable the Xtal 32 kHz oscillator

Bit Field

Field Name

Value Symbol

Value Description

Hex Value

26

XTAL_N_OK_RESET

XTAL32K_NOT_OK_RESET

Xtal 32K not reset

0x1

25

XTAL_N_OK

XTAL_OK

Xtal 32K NOT OK sticky flag was not set

0x0*

XTAL_N_OK

Xtal 32K NOT OK sticky flag was set

0x1

24

READY

XTAL32K_NOT_OK

Xtal 32K not available

0x0*

XTAL32K_OK

Xtal 32K is OK

0x1

18

XIN_CAP_BYPASS_EN

XTAL32K_XIN_CAP_BYPASS_DISABLE

Disable the Xtal bypass switch of the XIN serial cap

0x0*

XTAL32K_XIN_CAP_BYPASS_ENABLE

Enable the Xtal bypass switch of the XIN serial cap

0x1

17

EN_AMPL_CTRL

XTAL32K_AMPL_CTRL_DISABLE

Xtal 32K amplitude control disabled

0x0

XTAL32K_AMPL_CTRL_ENABLE

Xtal 32K amplitude control enabled

0x1*

16

FORCE_READY

XTAL32K_NOT_FORCE_READY

Xtal 32K ready not forced

0x0*

XTAL32K_FORCE_READY

Xtal 32K ready forced

0x1

13:8

CLOAD_TRIM

XTAL32K_CTRIM_0P0PF

0 pF internal capacitor

0x0

XTAL32K_CTRIM_0P4PF

0.4 pF internal capacitor

0x1

XTAL32K_CTRIM_8P8PF

8.8 pF internal capacitor

0x16*

XTAL32K_CTRIM_25P2PF

25.2 pF internal capacitor

0x3F

7:4

ITRIM

XTAL32K_ITRIM_20NA

20 nA startup current

0x0

XTAL32K_ITRIM_80NA

80 nA startup current

0x3

XTAL32K_ITRIM_160NA

160 nA startup current

0x7*

XTAL32K_ITRIM_320NA

320 nA startup current

0xF

1

IBOOST

XTAL32K_IBOOST_DISABLE

Disable the Xtal 32 kHz current boosting mode

0x0*

XTAL32K_IBOOST_ENABLE

Disable the Xtal 32 kHz enable boosting mode (4x itrim currents)

0x1

0

ENABLE

XTAL32K_DISABLE

Disable the Xtal 32 kHz oscillator

0x0*

XTAL32K_ENABLE

Enable the Xtal 32 kHz oscillator

0x1