LPC18S50 datasheet(57/151 Pages) NXP

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LPC18S50_S30_S10

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Product data sheet

Rev. 1 — 23 February 2015

57 of 151

NXP Semiconductors

LPC18S50/S30/S10

32-bit ARM Cortex-M3 microcontroller

WAKEUP0

130

[11]

I; IA

External wake-up input; can raise an interrupt and can cause

wake-up from any of the low-power modes. A pulse with a

duration of at least 45 ns wakes up the part. This pin does not

have an external pull-up.

WAKEUP1

A10

[11]

I; IA

External wake-up input; can raise an interrupt and can cause

wake-up from any of the low-power modes. A pulse with a

duration of at least 45 ns wakes up the part. This pin does not

have an external pull-up.

WAKEUP2

[11]

I; IA

External wake-up input; can raise an interrupt and can cause

wake-up from any of the low-power modes. A pulse with a

duration of at least 45 ns wakes up the part. This pin does not

have an external pull-up.

WAKEUP3

[11]

I; IA

External wake-up input; can raise an interrupt and can cause

wake-up from any of the low-power modes. A pulse with a

duration of at least 45 ns wakes up the part. This pin does not

have an external pull-up.

ADC pins

ADC0_0/

ADC1_0/DAC

[8]

AI/O;

ADC input channel 0. Shared between 10-bit ADC0/1 and

DAC.

ADC0_1/

ADC1_1

[8]

AI; IA

ADC input channel 1. Shared between 10-bit ADC0/1.

ADC0_2/

ADC1_2

143

[8]

AI; IA

ADC input channel 2. Shared between 10-bit ADC0/1.

ADC0_3/

ADC1_3

139

[8]

AI; IA

ADC input channel 3. Shared between 10-bit ADC0/1.

ADC0_4/

ADC1_4

138

[8]

AI; IA

ADC input channel 4. Shared between 10-bit ADC0/1.

ADC0_5/

ADC1_5

144

[8]

AI; IA

ADC input channel 5. Shared between 10-bit ADC0/1.

ADC0_6/

ADC1_6

142

[8]

AI; IA

ADC input channel 6. Shared between 10-bit ADC0/1.

ADC0_7/

ADC1_7

136

[8]

AI; IA

ADC input channel 7. Shared between 10-bit ADC0/1.

RTC

RTC_ALARM

A11

A10

129

[11]

RTC controlled output. This pin has an internal pull-up. The

reset state of this pin is LOW after POR. For all other types of

reset, the reset state depends on the state of the RTC alarm

interrupt.

RTCX1

125

[8]

Input to the RTC 32 kHz ultra-low power oscillator circuit.

RTCX2

126

[8]

Output from the RTC 32 kHz ultra-low power oscillator circuit.

Crystal oscillator pins

XTAL1

[8]

Input to the oscillator circuit and internal clock generator

circuits.

XTAL2

[8]

Output from the oscillator amplifier.

Table 3.

Pin description …continued

LCD, Ethernet, USB0, and USB1 functions are not available on all parts. See Table 2.

Symbol

Description

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