NXP Semiconductors LPC822M101JDH20, User Manual, Page: 81 / 487

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User manual Rev. 1.2 — 5 October 2016 81 of 487
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Chapter 7: LPC82x Switch matrix (SWM)
– If a fixed-pin function is deselected and no movable function is assigned to this pin,
the pin is assigned its GPIO function.
– On reset, all fixed-pin functions are deselected.
– If a fixed-pin analog function is selected, its assigned pin cannot be used for any
other function.
7.5 Register description
Table 66. Register overview: Switch matrix (base address 0x4000 C000)
Name Access Offset Description Reset value Reference
PINASSIGN0 R/W 0x000 Pin assign register 0. Assign movable
functions U0_TXD, U0_RXD, U0_RTS,
U0_CTS. 0xFFFF FFFF Table 67
PINASSIGN1 R/W 0x004 Pin assign register 1. Assign movable
functions U0_SCLK, U1_TXD, U1_RXD,
U1_RTS. 0xFFFF FFFF Table 68
PINASSIGN2 R/W 0x008 Pin assign register 2. Assign movable
functions U1_CTS, U1_SCLK, U2_TXD,
U2_RXD. 0xFFFF FFFF Table 69
PINASSIGN3 R/W 0x00C Pin assign register 3. Assign movable
function U2_RTS, U2_CTS, U2_SCLK,
SPI0_SCK. 0xFFFF FFFF Table 70
PINASSIGN4 R/W 0x010 Pin assign register 4. Assign movable
functions SPI0_MOSI, SPI0_MISO,
SPI0_SSEL0, SPI0_SSEL1. 0xFFFF FFFF Table 71
PINASSIGN5 R/W 0x014 Pin assign register 5. Assign movable
functions SPI0_SSEL2, SPI0_SSEL3,
SPI1_SCK, SPI1_MOSI 0xFFFF FFFF Table 72
PINASSIGN6 R/W 0x018 Pin assign register 6. Assign movable
functions SPI1_MISO, SPI1_SSEL0,
SPI1_SSEL1, SCT0_IN0.
0xFFFF FFFF Table 73
PINASSIGN7 R/W 0x01C Pin assign register 7. Assign movable
functions SCT_IN1, SCT_IN2, SCT_IN3,
SCT_OUT0.
0xFFFF FFFF Table 74
PINASSIGN8 R/W 0x020 Pin assign register 8. Assign movable
functions SCT_OUT1, SCT_OUT2,
SCT_OUT3, SCT_OUT4.
0xFFFF FFFF Table 75
PINASSIGN9 R/W 0x024 Pin assign register 9. Assign movable
functions SCT_OUT5, I2C1_SDA,
I2C1_SCL, I2C2_SDA.
0xFFFF FFFF Table 76