LPC2101_02_03_4

© NXP B.V. 2009. All rights reserved.

Product data sheet

Rev. 04 — 2 June 2009

9 of 37

NXP Semiconductors

LPC2101/02/03

Single-chip 16-bit/32-bit microcontrollers

[1]

[2]

pull-up to provide an output functionality. Open-drain configuration applies to ALL functions on that pin.

[3]

analog input function. If configured for an input function, this pad utilizes built-in glitch filter that blocks pulses shorter than 3 ns. When

configured as an ADC input, digital section of the pad is disabled.

[4]

If configured for an input function, this pad utilizes built-in glitch filter that blocks pulses shorter than 3 ns.

[5]

A LOW level during reset on pin P0.14 is considered as an external hardware request to start the ISP command handler.

[6]

[7]

Pad provides special analog functionality.

[8]

For lowest power consumption, pin should be left floating when the RTC is not used.

[9]

See

LPC2101/02/03 User manual UM10161 for details.

7, 19, 43

I

Ground: 0 V reference.

31

I

Analog ground: 0 V reference. This should be nominally the same voltage as

42

I

Analog 3.3 V power supply: This should be nominally the same voltage as

pin also provides a voltage reference level for the ADC.

5I

1.8 V core power supply: This is the power supply voltage for internal

circuitry and the on-chip PLL.

17, 40

I

3.3 V pad power supply: This is the power supply voltage for the I/O ports.

VBAT

4

I

RTC power supply: 3.3 V on this pin supplies the power to the RTC.

Table 3.

Symbol

Pin

Type

Description