LPC1766_0.02
© NXP B.V. 2008. All rights reserved.
Objective data sheet
Rev. 00.02 — 12 August 2008
12 of 70
NXP Semiconductors
LPC1766
Fast communication chip
P2[8]/TD2/
TXD2
65[1]
I/O
P2[8] — General purpose digital input/output pin.
O
TD2 — CAN2 transmitter output.
O
TXD2 — Transmitter output for UART2.
P2[9]/
USB_CONNECT/
RXD2
64[1]
I/O
P2[9] — General purpose digital input/output pin.
O
USB_CONNECT — Signal used to switch an external 1.5 k
Ω resistor under
software control. Used with the SoftConnect USB feature.
I
RXD2 — Receiver input for UART2.
P2[10]/EINT0/NMI
53[6]
I/O
P2[10] — General purpose digital input/output pin.
Note: LOW on this pin while RESET is LOW forces on-chip bootloader to take
over control of the part after a reset.
I
EINT0 — External interrupt 0 input.
I
NMI — Non-maskable interrupt input.
P2[11]/EINT1/
I2STX_CLK
52[6]
I/O
P2[11] — General purpose digital input/output pin.
I
EINT1 — External interrupt 1 input.
I/O
I2STX_CLK — Transmit Clock. It is driven by the master and received by the
slave. Corresponds to the signal SCK in the I2S-bus specification.
P2[12]/EINT2/
I2STX_WS
51[6]
I/O
P2[12] — General purpose digital input/output pin.
I
EINT2 — External interrupt 2 input.
I/O
I2STX_WS — Transmit Word Select. It is driven by the master and received by the
slave. Corresponds to the signal WS in the I2S-bus specification.
P2[13]/EINT3/
I2STX_SDA
50[6]
I/O
P2[13] — General purpose digital input/output pin.
I
EINT3 — External interrupt 3 input.
I/O
I2STX_SDA — Transmit data. It is driven by the transmitter and read by the
receiver. Corresponds to the signal SD in the I2S-bus specification.
P3[0] to P3[31]
I/O
Port 3: Port 3 is a 32-bit I/O port with individual direction controls for each bit. The
operation of port 3 pins depends upon the pin function selected via the pin connect
block. Pins 0 through 24, and 27 through 31 of this port are not available.
P3[25]/MAT0[0]/
PWM1[2]
27[1]
I/O
P3[25] — General purpose digital input/output pin.
O
MAT0[0] — Match output for Timer 0, channel 0.
O
PWM1[2] — Pulse Width Modulator 1, output 2.
P3[26]/STCLK/
MAT0[1]/PWM1[3]
26[1]
I/O
P3[26] — General purpose digital input/output pin.
I
STCLK — System tick timer clock input.
O
MAT0[1] — Match output for Timer 0, channel 1.
O
PWM1[3] — Pulse Width Modulator 1, output 3.
P4[0] to P4[31]
I/O
Port 4: Port 4 is a 32-bit I/O port with individual direction controls for each bit. The
operation of port 4 pins depends upon the pin function selected via the pin connect
block. Pins 0 through 27, 30, and 31 of this port are not available.
P4[28]/RX_MCLK/
MAT2[0]/TXD3
82[1]
I/O
P4[28] — General purpose digital input/output pin.
I
RX_MCLK — I2S receive master clock.
O
MAT2[0] — Match output for Timer 2, channel 0.
O
TXD3 — Transmitter output for UART3.
Table 3.
Pin description …continued
Symbol
Pin
Type
Description
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