WM8321
Production Data
DESCRIPTION
ADDRESS
BIT
LABEL
DEFAULT
LDOn_UV_S
TS
LDOn Undervoltage Status
0 = Normal
9:0
0
1 = Undervoltage
Notes:
1. n is a number between 1 and 10 that identifies the individual LDO Regulator (LDO1 - 10).
2. m 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
R16403
(4013h)
BIT
LABEL
DESCRIPTION
LDOn Undervoltage interrupt
(Rising Edge triggered)
UV_LDOn_EINT
9:0
Interrupt Status
3
Note: Cleared when a ‘1’ is written.
R16404
(4014h)
HC_DC2_EINT
HC_DC1_EINT
UV_DCm_EINT
IM_UV_LDOn_EINT
DC-DC2 High current interrupt
(Rising Edge triggered)
Note: Cleared when a ‘1’ is written.
DC-DC1 High current interrupt
(Rising Edge triggered)
Note: Cleared when a ‘1’ is written.
DC-DCm Undervoltage interrupt
(Rising Edge triggered)
Note: Cleared when a ‘1’ is written.
Interrupt mask.
9
Interrupt Status
4
8
3:0
9:0
R16411
(401Bh)
0 = Do not mask interrupt.
1 = Mask interrupt.
Interrupt Status
3 Mask
Default value is 1 (masked)
Interrupt mask.
R16412
(401Ch)
IM_HC_DC2_EINT
IM_HC_DC1_EINT
IM_UV_DCm_EINT
9
8
0 = Do not mask interrupt.
1 = Mask interrupt.
Interrupt Status
4 Mask
Default value is 1 (masked)
Interrupt mask.
0 = Do not mask interrupt.
1 = Mask interrupt.
Default value is 1 (masked)
Interrupt mask.
3:0
0 = Do not mask interrupt.
1 = Mask interrupt.
PD, February 2012, Rev 4.0
86
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
