Microcontrollers User manual

UM10237_2 © NXP B.V. 2008. All rights reserved.
User manual Rev. 02 — 19 December 2008 160 of 792
NXP Semiconductors
UM10237
Chapter 8: LPC24XX Pin configuration
P0[19]/DSR1/
MCICLK/SDA1
122
[1]
L17
[1]
I/O P0[19] — General purpose digital input/output pin.
I DSR1 — Data Set Ready input for UART1.
O MCICLK — Clock output line for SD/MMC interface.
I/O SDA1 — I
2
C1 data input/output (this is not an open-drain pin).
P0[20]/DTR1/
MCICMD/SCL1
120
[1]
M17
[1]
I/O P0[20] — General purpose digital input/output pin.
O DTR1 — Data Terminal Ready output for UART1.
I/O MCICMD — Command line for SD/MMC interface.
I/O SCL1 — I
2
C1 clock input/output (this is not an open-drain pin).
P0[21]/RI1/
MCIPWR/RD1
118
[1]
M16
[1]
I/O P0[21] — General purpose digital input/output pin.
I RI1 — Ring Indicator input for UART1.
O MCIPWR — Power Supply Enable for external SD/MMC power supply.
I RD1 — CAN1 receiver input.
P0[22]/RTS1/
MCIDAT0/TD1
116
[1]
N17
[1]
I/O P0[22] — General purpose digital input/output pin.
O RTS1 — Request to Send output for UART1.
I/O MCIDAT0 — Data line 0 for SD/MMC interface.
O TD1 — CAN1 transmitter output.
P0[23]/AD0[0]/
I2SRX_CLK/
CAP3[0]
18
[2]
H1
[2]
I/O P0[23] — General purpose digital input/output pin.
I AD0[0] — A/D converter 0, input 0.
I/O I2SRX_CLK — Receive Clock. It is driven by the master and received by
the slave. Corresponds to the signal SCK in the I
2
S-bus specification.
I CAP3[0] — Capture input for Timer 3, channel 0.
P0[24]/AD0[1]/
I2SRX_WS/
CAP3[1]
16
[2]
G2
[2]
I/O P0[24] — General purpose digital input/output pin.
I AD0[1] — A/D converter 0, input 1.
I/O I2SRX_WS — Receive Word Select. It is driven by the master and
received by the slave. Corresponds to the signal WS in the I
2
S-bus
specification.
I CAP3[1] — Capture input for Timer 3, channel 1.
P0[25]/AD0[2]/
I2SRX_SDA/
TXD3
14
[2]
F1
[2]
I/O P0[25] — General purpose digital input/output pin.
I AD0[2] — A/D converter 0, input 2.
I/O I2SRX_SDA — Receive data. It is driven by the transmitter and read by
the receiver. Corresponds to the signal SD in the I
2
S-bus specification.
O TXD3 — Transmitter output for UART3.
P0[26]/AD0[3]/
AOUT/RXD3
12
[2][3]
E1
[2][3]
I/O P0[26] — General purpose digital input/output pin.
I AD0[3] — A/D converter 0, input 3.
O AOUT — D/A converter output.
I RXD3 — Receiver input for UART3.
P0[27]/SDA0 50
[4]
T1
[4]
I/O P0[27] — General purpose digital input/output pin.
I/O SDA0 — I
2
C0 data input/output. Open-drain output (for I
2
C-bus
compliance).
P0[28]/SCL0 48
[4]
R3
[4]
I/O P0[28] — General purpose digital input/output pin.
I/O SCL0 — I
2
C0 clock input/output. Open-drain output (for I
2
C-bus
compliance).
Table 124. LPC2470/78 pin description …continued
Symbol Pin Ball Type Description