Product data

Product data sheet Rev. 9.5 — 24 June 2014 20 of 89

NXP Semiconductors

LPC1769/68/67/66/65/64/63

32-bit ARM Cortex-M3 microcontroller

[1] 5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis. This pin is pulled up to a voltage level of 2.3 V to 2.6 V.

[2] 5 V tolerant pad providing digital I/O functions (with TTL levels and hysteresis) and analog input. When configured as a ADC input,

digital section of the pad is disabled and the pin is not 5 V tolerant. This pin is pulled up to a voltage level of 2.3 V to 2.6 V.

[3] 5 V tolerant pad providing digital I/O with TTL levels and hysteresis and analog output function. When configured as the DAC output,

digital section of the pad is disabled. This pin is pulled up to a voltage level of 2.3 V to 2.6 V.

[4] Open-drain 5 V tolerant digital I/O pad, compatible with I

C-bus 400 kHz specification. This pad requires an external pull-up to provide

output functionality. When power is switched off, this pin connected to the I

C-bus is floating and does not disturb the I

C lines.

Open-drain configuration applies to all functions on this pin.

[5] Pad provides digital I/O and USB functions. It is designed in accordance with the USB specification, revision 2.0 (Full-speed and

Low-speed mode only). This pad is not 5 V tolerant.

[6] 5 V tolerant pad with 10 ns glitch filter providing digital I/O functions with TTL levels and hysteresis. This pin is pulled up to a voltage

level of 2.3 V to 2.6 V.

[7] 5 V tolerant pad with TTL levels and hysteresis. Internal pull-up and pull-down resistors disabled.

[8] 5 V tolerant pad with TTL levels and hysteresis and internal pull-up resistor.

[9] 5 V tolerant pad with 20 ns glitch filter providing digital I/O function with TTL levels and hysteresis.

[10] Pad provides special analog functionality. A 32 kHz crystal oscillator must be used with the RTC.

[11] When the system oscillator is not used, connect XTAL1 and XTAL2 as follows: XTAL1 can be left floating or can be grounded (grounding

is preferred to reduce susceptibility to noise). XTAL2 should be left floating.

[12] When the RTC is not used, connect VBAT to V

DD(REG)(3V3)

and leave RTCX1 floating.

VREFN 15 F1 A6 I ADC negative reference voltage: This should be nominally the

same voltage as V

but should be isolated to minimize noise and

error. Level on this pin is used as a reference for ADC and DAC.

VBAT 19 G2 A8

[10][12]

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

RTC peripheral.

n.c. 13 D4,

B6,

- not connected.

Table 5. Pin description

…continued

Symbol Pin/ball Type Description

LQFP100

TFBGA100

WLCSP100