LPC2141_42_44_46_48_4

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 04 — 17 November 2008

12 of 40

NXP Semiconductors

LPC2141/42/44/46/48

Single-chip 16-bit/32-bit microcontrollers

[4]

5 V tolerant pad (no built-in pull-up resistor) providing digital I/O (with TTL levels and hysteresis and 10 ns slew rate control) and 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.

[5]

5 V tolerant pad (no built-in pull-up resistor) providing digital I/O (with TTL levels and hysteresis and 10 ns slew rate control) and analog

output function. When configured as the DAC output, digital section of the pad is disabled.

[6]

5 V tolerant pad with built-in pull-up resistor providing digital I/O functions with TTL levels and hysteresis and 10 ns slew rate control.

The pull-up resistor’s value typically ranges from 60 k

Ω to 300 kΩ.

[7]

Pad is designed in accordance with the Universal Serial Bus (USB) specification, revision 2.0 (Full-speed and Low-speed mode only).

[8]

5 V tolerant pad providing digital input (with TTL levels and hysteresis) function only.

[9]

Pad provides special analog functionality.