UM10503
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User manual
Rev. 1.3 — 6 July 2012
945 of 1269
NXP Semiconductors
UM10503
Chapter 36: LPC43xx Event monitor/recorder
36.7.2 Event Monitor/Recorder Status Register
The Event Monitor/Recorder Status Register contains flags for the 3 event channels,
general purpose register clear flag, and the interrupt/wakeup flag.
Table 815. Event Monitor/Recorder Status Register (ERSTATUS - address 0x4004 6080) bit description
Bit
Symbol
Value Description
Reset
value
0
EV0
Channel0 event flag (WAKEUP0 pin). Set at the end of any second if there has
been an event during the preceding second. This bit is cleared by writing a 1 to it.
Writing 0 has no effect.
0
0
No event change on channel 0.
1
At least one event has occurred on channel 0.
1
EV1
Channel1 Event flag (WAKEUP1 pin). Set at the end of any second if there has
been an event during the preceding second. This bit is cleared by writing a 1 to it.
Writing 0 has no effect.
0
0
No event change on channel 1.
1
At least one event has occurred on channel 1.
2
EV2
Channel2 Event flag (WAKEUP2 pin). Set at the end of any second if there has
been an event during the preceding second. This bit is cleared by writing a 1 to it.
Writing 0 has no effect.
0
0
No event change on channel 2.
1
At least one event has occurred on channel 2.
3
GP_CLEARED
General purpose register asynchronous clear flag. This bit is cleared by writing a 1
to it. Writing 0 has no effect.
0
0
General purpose registers have not been asynchronous cleared.
1
General purpose registers have been asynchronous cleared.
30:4
-
Reserved. Read value is undefined, only zero should be written.
NA
31
WAKEUP
Interrupt/wakeup request flag (Read-only). This bit is cleared by writing a 1 to it.
Writing 0 has no effect.
0
0
No interrupt/wakeup request is pending
1
An interrupt/wakeup request is pending.