LPC2420_60

Manufacturer Part NumberLPC2420_60
DescriptionNXP Semiconductors designed the LPC2420/2460 microcontroller around a 16-bit/32-bitARM7TDMI-S CPU core with real-time debug interfaces that include both JTAG andembedded trace
ManufacturerNXP Semiconductors
LPC2420_60 datasheet
 
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NXP Semiconductors
Table 4.
Pin description
…continued
Symbol
Pin
V
26, 86,
DD(DCDC)(3V3)
[7]
174
[7]
V
20
DDA
[7]
VREF
24
[7]
VBAT
38
[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 ADC 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
functionality. When power is switched off, this pin connected to the I
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 5 ns glitch filter providing digital I/O functions with TTL levels and hysteresis.
[7]
Pad provides special analog functionality.
[8]
This pin has a built-in pull-up resistor.
[9]
This pin has no built-in pull-up and no built-in pull-down resistor.
[10] 5 V tolerant pad with 20 ns glitch filter providing digital I/O function with TTL levels and hysteresis.
[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.
LPC2420_60
Product data sheet
Ball
Type
Description
H4, P11,
I
3.3 V DC-to-DC converter supply voltage: This is the power supply
[7]
D11
for the on-chip DC-to-DC converter.
[7]
G4
I
analog 3.3 V pad supply voltage: This should be nominally the
same voltage as V
error. This voltage is used to power the ADC and DAC.
[7]
K1
I
ADC reference: This should be nominally the same voltage as
V
but should be isolated to minimize noise and error. The level
DD(3V3)
on this pin is used as a reference for ADC and DAC.
[7]
M3
I
RTC power supply: 3.3 V on this pin supplies the power to the RTC.
2
C-bus 400 kHz specification. It requires an external pull-up to provide output
2
C-bus is floating and does not disturb the I
All information provided in this document is subject to legal disclaimers.
Rev. 6.1 — 22 September 2011
LPC2420/2460
Flashless 16-bit/32-bit microcontroller
but should be isolated to minimize noise and
DD(3V3)
2
C-bus lines. Open-drain
© NXP B.V. 2011. All rights reserved.
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