UM11029
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© NXP Semiconductors N.V. 2017. All rights reserved.
User manual
Rev. 1.0 — 16 June 2017
87 of 515
NXP Semiconductors
UM11029
Chapter 8: LPC84x System configuration (SYSCON)
MAINCLKPLLSEL
R/W
0x048
Main clock PLL source select
0
MAINCLKPLLUEN
R/W
0x04C
Main clock PLL source update enable
0
MAINCLKSEL
R/W
0x050
Main clock source select
0
MAINCLKUEN
R/W
0x054
Main clock source update enable
0
SYSAHBCLKDIV
R/W
0x058
System clock divider
1
-
-
0x05C
Reserved
-
-
ADCCLKSEL
R/W
0x064
ADC clock source select
0
ADCCLKDIV
R/W
0x068
ADC clock divider
0
SCTCLKSEL
R/W
0x06C
SCT clock source select
0
SCTCLKDIV
R/W
0x070
SCT clock divider
0
EXTCLKSEL
R/W
0x074
External clock source select
0
-
-
0x078
Reserved
-
-
-
-
0x07C
Reserved
-
-
SYSAHBCLKCTRL0
R/W
0x080
System clock control 0
0x17
SYSAHBCLKCTRL1
R/W
0x084
System clock control 1
0x0
PRESETCTRL0
R/W
0x088
Peripheral reset control 0
0xFFFFFFFF
PRESETCTRL1
R/W
0x08C
Peripheral reset control 1
0x1F
UART0CLKSEL
R/W
0x090
Function clock source select for UART0
0x7
UART1CLKSEL
R/W
0x094
Function clock source select for UART1
0x7
UART2CLKSEL
R/W
0x098
Function clock source select for UART2
0x7
UART3CLKSEL
R/W
0x09C
Function clock source select for UART3
0x7
UART4CLKSEL
R/W
0x0A0
Function clock source select for UART4
0x7
I2C0CLKSEL
R/W
0x0A4
Function clock source select for I
2
C0
0x7
I2C1CLKSEL
R/W
0x0A8
Function clock source select for I
2
C1
0x7
I2C2CLKSEL
R/W
0x0AC
Function clock source select for I
2
C2
0x7
I2C3CLKSEL
R/W
0x0B0
Function clock source select for I
2
C3
0x7
SPI0CLKSEL
R/W
0x0B4
Function clock source select for SPI0
0x7
SPI1CLKSEL
R/W
0x0B8
Function clock source select for SPI1
0x7
-
-
0x0BC
Reserved
-
-
-
-
0x0C0
Reserved
-
-
-
-
0x0C4
Reserved
-
-
-
-
0x0C8
Reserved
-
-
-
-
0x0CC
Reserved
-
-
FRG0DIV
R/W
0x0D0
Fractional generator divider value
0x0
FRG0MULT
R/W
0x0D4
Fractional generator multiplier value
0x0
FRG0CLKSEL
R/W
0x0D8
FRG0 clock source select
0
-
-
0x0DC
Reserved
-
-
FRG1DIV
R/W
0x0E0
Fractional generator divider value
0x0
FRG1MULT
R/W
0x0E4
Fractional generator multiplier value
0x0
FRG1CLKSEL
R/W
0x0E8
FRG1 clock source select
0
-
-
0x0EC
Reserved
-
Table 125. Register overview: System configuration (base address 0x4004 8000)
…continued
Name
Access Offset
Description
Reset value
Section