Datasheet

LPC2387 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 5.1 — 16 October 2013 13 of 66
NXP Semiconductors
LPC2387
Single-chip 16-bit/32-bit MCU
[1] 5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis.
[2] 5 V tolerant pad providing digital I/O functions (with TTL levels and hysteresis) and analog input. When configured as a DAC input,
digital section of the pad is disabled.
[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.
[4] Open-drain 5 V tolerant digital I/O pad, compatible with I
2
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
2
C-bus is floating and does not disturb the I
2
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).
[6] 5 V tolerant pad with 10 ns glitch filter providing digital I/O functions with TTL levels and hysteresis.
[7] This pin has no built-in pull-up and no built-in pull-down resistor.
[8] This pin has a built-in 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.
[11] When the main 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] If the RTC is not used, these pins can be left floating.
[13] Pad provides special analog functionality.
[14] Pad provides special analog functionality.
[15] Pad provides special analog functionality.
[16] Pad provides special analog functionality.
[17] Pad provides special analog functionality.
V
SS
15, 31,
41, 55,
72, 97,
83
[13]
I ground: 0 V reference.
V
SSA
11
[14]
I analog ground: 0 V reference. This should nominally be the same voltage as
V
SS
, but should be isolated to minimize noise and error.
V
DD(3V3)
28, 54,
71, 96
[15]
I 3.3 V supply voltage: This is the power supply voltage for the I/O ports.
V
DD(DCDC)(3V3)
13, 42,
84
[16]
I 3.3 V DC-to-DC converter supply voltage: This is the supply voltage for the
on-chip DC-to-DC converter only.
V
DDA
10
[17]
I analog 3.3 V pad supply voltage: This should be nominally the same voltage
as V
DD(3V3)
but should be isolated to minimize noise and error. This voltage is
used to power the ADC and DAC.
VREF 12
[17]
I ADC reference: This should be nominally the same voltage as V
DD(3V3)
but
should be isolated to minimize noise and error. Level on this pin is used as a
reference for ADC and DAC.
VBAT 19
[17]
I RTC pin power supply: 3.3 V on this pin supplies the power to the RTC
peripheral.
Table 3. Pin description …continued
Symbol Pin Type Description