Datasheet

UM10398 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
User manual Rev. 12.3 — 10 June 2014 40 of 547
NXP Semiconductors
UM10398
Chapter 3: LPC111x/LPC11Cxx System configuration (SYSCON)
Remark: Each interrupt connected to a start logic input must be enabled in the NVIC if the
corresponding PIO pin is used to wake up the chip from Deep-sleep mode.
3.5.31 Start logic signal enable register 0
This STARTERP0 register enables or disables the start signal bits in the start logic. The bit
assignment is identical to Table 37
.
3.5.32 Start logic reset register 0
Writing a one to a bit in the STARTRSRP0CLR register resets the start logic state. The bit
assignment is identical to Table 37
. The start-up logic uses the input signals to generate a
clock edge for registering a start signal. This clock edge (falling or rising) sets the interrupt
for waking up from Deep-sleep mode. Therefore, the start-up logic states must be cleared
before being used.
Table 37. Start logic edge control register 0 (STARTAPRP0, address 0x4004 8200) bit
description
Bit Symbol Description Reset
value
11:0 APRPIO0_n Edge select for start logic input PIO0_n: PIO0_11 to PIO0_0
0 = Falling edge
1 = Rising edge
0x0
12 APRPIO1_0 Edge select for start logic input PIO1_0
0 = Falling edge
1 = Rising edge
0x0
31:13 - Reserved. Do not write a 1 to reserved bits in this register. 0x0
Table 38. Start logic signal enable register 0 (STARTERP0, address 0x4004 8204) bit
description
Bit Symbol Description Reset
value
11:0 ERPIO0_n Enable start signal for start logic input PIO0_n: PIO0_11 to
PIO0_0
0 = Disabled
1 = Enabled
0x0
12 ERPIO1_0 Enable start signal for start logic input PIO1_0
0 = Disabled
1 = Enabled
0x0
31:13 - Reserved. Do not write a 1 to reserved bits in this register. 0x0
Table 39. Start logic reset register 0 (STARTRSRP0CLR, address 0x4004 8208) bit
description
Bit Symbol Description Reset
value
11:0 RSRPIO0_n Start signal reset for start logic input PIO0_n:PIO0_11 to
PIO0_0
0 = Do nothing.
1 = Writing 1 resets the start signal.
n/a
12 RSRPIO1_0 Start signal reset for start logic input PIO1_0
0 = Do nothing.
1 = Writing 1 resets the start signal.
n/a
31:13 - Reserved. Do not write a 1 to reserved bits in this register. n/a