WM8321 datasheet(86/253 Pages) WOLFSON

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WM8321

Production Data

PD, February 2012, Rev 4.0

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

9:0

LDOn_UV_S

LDOn Undervoltage Status

0 = Normal

1 = Undervoltage

Notes:

is a number between 1 and 10 that identifies the individual LDO Regulator (LDO1 - 10).

is a number between 1 and 4 that identifies the individual DC-DC Converter (DC-DC1 - 4).

Table 38 DC Converter and LDO Regulator Status

15.12 POWER MANAGEMENT INTERRUPTS

Undervoltage monitoring is provided on all DC-DC Converters and LDO Regulators, as described in

Section 15.10. The associated interrupt flags indicate an undervoltage condition in each individual

DC-DC Converter or LDO Regulator. Each of these secondary interrupts triggers a primary

Undervoltage Interrupt, UV_INT (see Section 23). This can be masked by setting the mask bit(s) as

described in Table 39.

Current monitoring is provided on DC-DC1 and DC-DC2, as described in Section 15.10. The interrupt

flags HC_DC1_EINT and HC_DC2_EINT indicate a high current condition in DC-DC1 and DC-DC2

respectively. Each of these secondary interrupts triggers a primary High Current Interrupt, HC_INT

(see Section 23). This can be masked by setting the mask bit(s) as described in Table 39.

The high current thresholds are programmable; these are set by DC1_HC_THR and DC2_HC_THR

for DC-DC1 and DC-DC2 respectively. See Section 15.11.2 for details of these register fields. Note

that these functions are for current monitoring; they do not equate to the DC-DC Converter maximum

current limit.

ADDRESS

BIT

LABEL

DESCRIPTION

R16403

(4013h)

Interrupt Status

9:0

UV_LDOn_EINT

LDOn Undervoltage interrupt

(Rising Edge triggered)

Note: Cleared when a ‘1’ is written.

R16404

(4014h)

Interrupt Status

HC_DC2_EINT

DC-DC2 High current interrupt

(Rising Edge triggered)

Note: Cleared when a ‘1’ is written.

HC_DC1_EINT

DC-DC1 High current interrupt

(Rising Edge triggered)

Note: Cleared when a ‘1’ is written.

3:0

UV_DCm_EINT

DC-DCm Undervoltage interrupt

(Rising Edge triggered)

Note: Cleared when a ‘1’ is written.

R16411

(401Bh)

Interrupt Status

3 Mask

9:0

IM_UV_LDOn_EINT

Interrupt mask.

0 = Do not mask interrupt.

1 = Mask interrupt.

Default value is 1 (masked)

R16412

(401Ch)

Interrupt Status

4 Mask

IM_HC_DC2_EINT

Interrupt mask.

0 = Do not mask interrupt.

1 = Mask interrupt.

Default value is 1 (masked)

IM_HC_DC1_EINT

Interrupt mask.

0 = Do not mask interrupt.

1 = Mask interrupt.

Default value is 1 (masked)

3:0

IM_UV_DCm_EINT

Interrupt mask.

0 = Do not mask interrupt.

1 = Mask interrupt.

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