UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
85 of 1269
NXP Semiconductors
UM10503
Chapter 9: LPC43xx Configuration Registers (CREG)
•
Bit 4 selects the functionality of the SCT outputs connected to the CTOUT_n pins and
selected GIMA inputs:
–
SCT output ORed with timer match output (default).
–
SCT output only.
•
Bits 15:12 control the I2S clock connections.
•
Bit 16 controls the external memory controller clocking.
Table 50.
CREG6 control register (CREG6, address 0x4004 312C) bit description
Bit
Symbol
Value Description
Reset
value
Access
2:0
ETHMODE
Selects the Ethernet mode. Reset the ethernet after changing
the PHY interface.
All other settings are reserved.
R/W
0x0
MII
0x4
RMII
3
-
Reserved.
R/W
4
CTOUTCTRL
Selects the functionality of the SCT outputs.
0
R/W
0
Combine SCT and timer match outputs. SCT outputs are
ORed with timer outputs.
1
SCT outputs only. SCT outputs are used without timer match
outputs.
11:5
-
Reserved.
-
-
12
I2S0_TX_SCK_IN_SEL
I2S0_TX_SCK input select
0
R/W
0
I2S clock selected as defined by the I2S transmit mode
register
.
1
Audio PLL (PLL0AUDIO) for I2S transmit clock MCLK input
and MCLK output. The I2S must be configured in slave mode.
13
I2S0_RX_SCK_IN_SEL
I2S0_RX_SCK input select
0
R/W
0
I2S clock selected as defined by the I2S receive mode
register
.
1
Audio PLL (PLL0AUDIO) for I2S receive clock MCLK input
and MCLK output. The I2S must be configured in slave mode.
14
I2S1_TX_SCK_IN_SEL
I2S1_TX_SCK input select
0
R/W
0
I2 S clock selected as defined by the I2S transmit mode
register
.
1
Audio PLL (PLL0AUDIO) for I2S transmit clock MCLK input
and MCLK output. The I2S must be configured in slave mode.
15
I2S1_RX_SCK_IN_SEL
I2S1_RX_SCK input select
0
R/W
0
I2 S clock selected as defined by the I2S receive mode
register
.
1
Audio PLL (PLL0AUDIO) for I2S receive clock MCLK input
and MCLK output. The I2S must be configured in slave mode.
16
EMC_CLK_SEL
EMC_CLK divided clock select (see
).
0
R/W
0
EMC_CLK_DIV not divided.
1
EMC_CLK_DIV divided by 2.
31:17
-
Reserved.
-
-