UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
149 of 1269
NXP Semiconductors
UM10503
Chapter 12: LPC43xx Clock Control Unit (CCU)
Remark:
Configure the output clock for the EMC clock divider (
) together with
bit 16 in the CREG6 register (
).
Table 105. CCU1 branch clock configuration register (CLK_XXX_CFG, addresses 0x4005
1100, 0x4005 1104,..., 0x4005 1A00) 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 mechanism enable
0
R/W
0
Wake-up is disabled.
1
Wake-up is enabled.
31:3
-
Reserved
-
-
Table 106. CCU1 branch clock configuration register (CLK_EMCDIV_CFG, addresses 0x4005
1478) 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 mechanism enable
0
R/W
0
Wake-up is disabled.
1
Wake-up is enabled.
3
-
Reserved
-
-
4
-
Reserved
-
-
7:5
DIV
Clock divider value
0
R/W
0x0
No division (divide by 1).
0x1
Divide by 2.
0x2
Reserved
0x3
Reserved
0x4
Reserved
31:8
-
Reserved
-
-