Nxp Semiconductors UM10237 用户手册
UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008
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NXP Semiconductors
UM10237
Chapter 24: LPC24XX Timer0/1/2/3
Table 546. Summary of timer/counter registers
Generic
Name
Name
Description
Access Reset
Value
TIMERn Register/
Name & Address
Name & Address
IR
Interrupt Register. The IR can be written to
clear interrupts. The IR can be read to
identify which of eight possible interrupt
sources are pending.
clear interrupts. The IR can be read to
identify which of eight possible interrupt
sources are pending.
R/W
0
T0IR - 0xE000 4000
T1IR - 0xE000 8000
T2IR - 0xE007 0000
T3IR - 0xE007 4000
T1IR - 0xE000 8000
T2IR - 0xE007 0000
T3IR - 0xE007 4000
TCR
Timer Control Register. The TCR is used to
control the Timer Counter functions. The
Timer Counter can be disabled or reset
through the TCR.
control the Timer Counter functions. The
Timer Counter can be disabled or reset
through the TCR.
R/W
0
T0TCR - 0xE000 4004
T1TCR - 0xE000 8004
T2TCR - 0xE007 0004
T3TCR - 0xE007 4004
T1TCR - 0xE000 8004
T2TCR - 0xE007 0004
T3TCR - 0xE007 4004
TC
Timer Counter. The 32 bit TC is
incremented every PR+1 cycles of PCLK.
The TC is controlled through the TCR.
incremented every PR+1 cycles of PCLK.
The TC is controlled through the TCR.
R/W
0
T0TC - 0xE000 4008
T1TC - 0xE000 8008
T2TC - 0xE007 0008
T3TC - 0xE007 4008
T1TC - 0xE000 8008
T2TC - 0xE007 0008
T3TC - 0xE007 4008
PR
Prescale Register. The Prescale Counter
(below) is equal to this value, the next clock
increments the TC and clears the PC.
(below) is equal to this value, the next clock
increments the TC and clears the PC.
R/W
0
T0PR - 0xE000 400C
T1PR - 0xE000 800C
T2PR - 0xE007 000C
T3PR - 0xE007 400C
T1PR - 0xE000 800C
T2PR - 0xE007 000C
T3PR - 0xE007 400C
PC
Prescale Counter. The 32 bit PC is a
counter which is incremented to the value
stored in PR. When the value in PR is
reached, the TC is incremented and the PC
is cleared. The PC is observable and
controllable through the bus interface.
counter which is incremented to the value
stored in PR. When the value in PR is
reached, the TC is incremented and the PC
is cleared. The PC is observable and
controllable through the bus interface.
R/W
0
T0PC - 0xE000 4010
T1PC - 0xE000 8010
T2PC - 0xE007 0010
T3PC - 0xE007 4010
T1PC - 0xE000 8010
T2PC - 0xE007 0010
T3PC - 0xE007 4010
MCR
Match Control Register. The MCR is used
to control if an interrupt is generated and if
the TC is reset when a Match occurs.
to control if an interrupt is generated and if
the TC is reset when a Match occurs.
R/W
0
T0MCR - 0xE000 4014
T1MCR - 0xE000 8014
T2MCR - 0xE007 0014
T3MCR - 0xE007 4014
T1MCR - 0xE000 8014
T2MCR - 0xE007 0014
T3MCR - 0xE007 4014
MR0
Match Register 0. MR0 can be enabled
through the MCR to reset the TC, stop both
the TC and PC, and/or generate an
interrupt every time MR0 matches the TC.
through the MCR to reset the TC, stop both
the TC and PC, and/or generate an
interrupt every time MR0 matches the TC.
R/W
0
T0MR0 - 0xE000 4018
T1MR0 - 0xE000 8018
T2MR0 - 0xE007 0018
T3MR0 - 0xE007 4018
T1MR0 - 0xE000 8018
T2MR0 - 0xE007 0018
T3MR0 - 0xE007 4018
MR1
Match Register 1. See MR0 description.
R/W
0
T0MR1 - 0xE000 401C
T1MR1 - 0xE000 801C
T2MR1 - 0xE007 001C
T3MR1 - 0xE007 401C
T1MR1 - 0xE000 801C
T2MR1 - 0xE007 001C
T3MR1 - 0xE007 401C
MR2
Match Register 2. See MR0 description.
R/W
0
T0MR2 - 0xE000 4020
T1MR2 - 0xE000 8020
T2MR2 - 0xE007 0020
T3MR2 - 0xE007 4020
T1MR2 - 0xE000 8020
T2MR2 - 0xE007 0020
T3MR2 - 0xE007 4020
MR3
Match Register 3. See MR0 description.
R/W
0
T0MR3 - 0xE000 4024
T1MR3 - 0xE000 8024
T2MR3 - 0xE007 0024
T3MR3 - 0xE007 4024
T1MR3 - 0xE000 8024
T2MR3 - 0xE007 0024
T3MR3 - 0xE007 4024
CCR
Capture Control Register. The CCR
controls which edges of the capture inputs
are used to load the Capture Registers and
whether or not an interrupt is generated
when a capture takes place.
controls which edges of the capture inputs
are used to load the Capture Registers and
whether or not an interrupt is generated
when a capture takes place.
R/W
0
T0CCR - 0xE000 4028
T1CCR - 0xE000 8028
T2CCR - 0xE007 0028
T3CCR - 0xE007 4028
T1CCR - 0xE000 8028
T2CCR - 0xE007 0028
T3CCR - 0xE007 4028