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UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
858 of 1269
NXP Semiconductors
UM10503
Chapter 29: LPC43xx Timer0/1/2/3
29.6.9 Timer capture registers (CR0 - CR3)
Each Capture register is associated with a device pin and may be loaded with the Timer
Counter value when a specified event occurs on that pin. The settings in the Capture
Control Register register determine whether the capture function is enabled, and whether
a capture event happens on the rising edge of the associated pin, the falling edge, or on
both edges.
5
CAP1I
Interrupt on CAPn.1 event
0
1
A CR1 load due to a CAPn.1 event will generate an interrupt.
0
This feature is disabled.
6
CAP2RE
Capture on CAPn.2 rising edge
0
1
A sequence of 0 then 1 on CAPn.2 will cause CR2 to be loaded
with the contents of TC.
0
This feature is disabled.
7
CAP2FE
Capture on CAPn.2 falling edge:
0
1
A sequence of 1 then 0 on CAPn.2 will cause CR2 to be loaded
with the contents of TC.
0
This feature is disabled.
8
CAP2I
Interrupt on CAPn.2 event
0
1
A CR2 load due to a CAPn.2 event will generate an interrupt.
0
This feature is disabled.
9
CAP3RE
Capture on CAPn.3 rising edge
0
1
A sequence of 0 then 1 on CAPn.3 will cause CR3 to be loaded
with the contents of TC.
0
This feature is disabled.
10
CAP3FE
Capture on CAPn.3 falling edge
0
1
A sequence of 1 then 0 on CAPn.3 will cause CR3 to be loaded
with the contents of TC.
0
This feature is disabled.
11
CAP3I
Interrupt on CAPn.3 event:
0
1
A CR3 load due to a CAPn.3 event will generate an interrupt.
0
This feature is disabled.
31:12 -
Reserved, user software should not write ones to reserved bits.
The value read from a reserved bit is not defined.
NA
Table 691. Timer capture control registers (CCR - addresses 0x4008 4028 (TIMER0),
0x4008 5020 (TIMER1), 0x400C 3028 (TIMER2), 0x400C 4028 (TIMER3)) bit
description
…continued
Bit
Symbol
Value Description
Reset
value
Table 692. Timer capture registers (CR[0:3], address 0x4008 402C (CR0) to 0x4008 4038
(CR3) (TIMER0), 0x4008 502C (CR0) to 0x4008 5038 (CR3) (TIMER1), 0x400C 302C
(CR0) to 0x400C 3038 (CR3) (TIMER2), 0x400C 402C (CR0) to 0x400C 4038 (CR3)
(TIMER3)) bit description
Bit
Symbol
Description
Reset
value
31:0
CAP
Timer counter capture value.
0