WM8321 Datasheet, PDF (86/253 Pages) Wolfson Microelectronics plc – Processor Power Management Subsystem

WM8321
Production Data
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
9:0 LDOn_UV_S
TS
0
LDOn Undervoltage Status
0 = Normal
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)
Interrupt Status
3
R16404
(4014h)
Interrupt Status
4
BIT
LABEL
9:0 UV_LDOn_EINT
9
HC_DC2_EINT
8
HC_DC1_EINT
3:0 UV_DCm_EINT
R16411
(401Bh)
Interrupt Status
3 Mask
R16412
(401Ch)
Interrupt Status
4 Mask
9:0 IM_UV_LDOn_EINT
9
IM_HC_DC2_EINT
8
IM_HC_DC1_EINT
3:0 IM_UV_DCm_EINT
w
DESCRIPTION
LDOn Undervoltage interrupt
(Rising Edge triggered)
Note: Cleared when a ‘1’ is written.
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.
0 = Do not mask interrupt.
1 = Mask interrupt.
Default value is 1 (masked)
Interrupt mask.
0 = Do not mask interrupt.
1 = Mask interrupt.
Default value is 1 (masked)
Interrupt mask.
0 = Do not mask interrupt.
1 = Mask interrupt.
Default value is 1 (masked)
Interrupt mask.
0 = Do not mask interrupt.
1 = Mask interrupt.
PD, February 2012, Rev 4.0
86