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UM10326
NXP Semiconductors
Chapter 4: LPC32x0 Clocking and power control
11.15 Start Raw Status Register for Internal Sources (START_RSR_INT 0x4000 4024)
The START_RSR_INT shows the current state of possible internal startup sources, prior
to masking.
Table 27.
Bit
Start Raw Status Register for Internal Sources (START_RSR_INT - 0x4000 4024)
Function
Reset
value
0
31:3 Same sources as for the START_ER_INT register.
Read:
0 = Pin or signal is inactive before masking.
1 = Pin or signal is active before masking.
Write:
0 = No effect.
1 = The captured state is cleared. Each source can be individually cleared.
2:0
Reserved, user software should not write ones to reserved bits. The value read from a reserved bit is not defined.
11.16 Start Activation Polarity Register for Pin Sources (START_APR_PIN 0x4000 403C)
The START_APR_PIN allows selecting the polarity that device pin start signal sources
use as a start condition.
Table 28.
Bit
31:3
Start Activation Polarity Register for Pin Sources (START_APR_PIN - 0x4000
403C)
Function
Reset
value
Same sources as for the START_ER_INT register.
0
0 = Active state is captured on falling edge of start signal.
1 = Active state is captured on rising edge of start signal.
2:0
Reserved, user software should not write ones to reserved bits. The value read
from a reserved bit is not defined.
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11.17 Start Activation Polarity Register for Internal Sources
(START_APR_INT - 0x4000 402C)
The START_APR_INT allows selecting the polarity that internal start signal sources use
as a start condition.
Table 29.
Start Activation Polarity Register for Internal Sources (START_APR_INT - 0x4000
402C)
Bit
Function
Reset
value
31:3
Same sources as for the START_ER_INT register.
0
0 = Active state is captured on falling edge of start signal.
1 = Active state is captured on rising edge of start signal.
2:0
Reserved, user software should not write ones to reserved bits. The value read
from a reserved bit is not defined.
UM10326_1
User manual
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© NXP B.V. 2009. All rights reserved.
Rev. 1 — 18 February 2009
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