UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
115 of 1269
NXP Semiconductors
UM10503
Chapter 11: LPC43xx Clock Generation Unit (CGU)
11.6.6 Integer divider register A
28:24
CLK_SEL
Clock-source selection.
0x01
R/W
0x00
32 kHz oscillator
0x01
IRC (default)
0x02
ENET_RX_CLK
0x03
ENET_TX_CLK
0x04
GP_CLKIN
0x05
Reserved
0x06
Crystal oscillator
0x07
PLL0USB
0x08
PLL0AUDIO
0x09
Reserved
0x0A
Reserved
0x0C
IDIVA
0x0D
IDIVB
0x0E
IDIVC
0x0F
IDIVD
0x10
IDIVE
31:29
-
Reserved
-
-
Table 80.
PLL1_CTRL register (PLL1_CTRL, address 0x4005 0044) bit description
…continued
Bit
Symbol
Value Description
Reset
value
Access
Table 81.
IDIVA control register (IDIVA_CTRL, address 0x4005 0048) bit description
Bit
Symbol
Value
Description
Reset
value
Access
0
PD
Integer divider A power down
0
R/W
0
IDIVA enabled (default)
1
power-down
1
-
Reserved
-
-
3:2
IDIV
Integer divider A divider values
(1/(IDIV + 1))
00
R/W
0x0
1 (default)
0x1
2
0x2
3
0x3
4
10:4
-
Reserved
-
-
11
AUTOBLOCK
Block clock automatically during frequency
change
0
R/W
0
Autoblocking disabled
1
Autoblocking enabled
23:12
-
Reserved
-
-