UM10503
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User manual
Rev. 2.1 — 10 December 2015
221 of 1441
NXP Semiconductors
UM10503
Chapter 14: LPC43xx/LPC43Sxx Clock Control Unit (CCU)
14.5.4 CCU1/2 branch clock status registers
Each output clock generated from the CCU has a status register. When writing to the
configuration register of an output clock, the Auto or Wake-up mechanism can delay the
update of the actual hardware signals. The Status Register shows the current value of
these signals. All output clock Status Registers follow the format as described in
.
Remark:
The divider value for the CLK_M4_EMCDIV_CFG register is not reflected in the
status register. Read the DIVSTAT bits in the CLK_M4_EMCDIV_CFG register for the
divider status.
Table 165. CCU2 branch clock configuration register (CLK_XXX_CFG, addresses 0x4005
2100, 0x4005 2200,..., 0x4005 2800) bit description
Bit
Symbol
Value
Description
Reset
value
Access
0
RUN
Run enable
1
R/W
0
Clock is disabled.
1
Clock is enabled.
1
AUTO
Auto (AHB disable mechanism) enable
0
R/W
0
Auto is disabled.
1
Auto is enabled.
2
WAKEUP
Wake-up configure
0
R/W
0
Wake-up is disabled.
1
Wake-up is enabled.
31:3
-
Reserved
-
-
Table 166. CCU1 branch clock status register (CLK_XXX_STAT, addresses 0x4005 1104,
0x4005 110C,..., 0x4005 1A04) bit description
Bit
Symbol
Description
Reset
value
Access
0
RUN
Run enable status
0 = clock is disabled.
1 = clock is enabled.
1
R
1
AUTO
Auto (AHB disable mechanism) enable status
0 = Auto is disabled.
1 = Auto is enabled.
0
R
2
WAKEUP
Wake-up mechanism enable status. This bit reads
as 1 when the power down bit has been set in the
PM register (PD = 1) and the clock has been
configured to run after wake-up.
0 = Wake-up is disabled.
1 = Wake-up is enabled.
0
R