LPC2420_60 NXP Semiconductors, LPC2420_60 Datasheet - Page 25

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LPC2420_60

Manufacturer Part Number
LPC2420_60
Description
NXP 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
Manufacturer
NXP Semiconductors
Datasheet
NXP Semiconductors
Table 4.
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[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
[12] If the RTC is not used, these pins can be left floating.
LPC2420_60
Product data sheet
Symbol
V
V
VREF
VBAT
DD(DCDC)(3V3)
DDA
5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis.
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.
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.
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.
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).
5 V tolerant pad with 5 ns glitch filter providing digital I/O functions with TTL levels and hysteresis.
Pad provides special analog functionality.
This pin has a built-in pull-up resistor.
This pin has no built-in pull-up and no built-in pull-down resistor.
is preferred to reduce susceptibility to noise). XTAL2 should be left floating.
Pin description
Pin
26, 86,
174
20
24
38
[7]
[7]
[7]
[7]
…continued
Ball
H4, P11,
D11
G4
K1
M3
[7]
[7]
[7]
[7]
All information provided in this document is subject to legal disclaimers.
Type
I
I
I
I
Rev. 6.1 — 22 September 2011
Description
3.3 V DC-to-DC converter supply voltage: This is the power supply
for the on-chip DC-to-DC converter.
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.
ADC reference: This should be nominally the same voltage as
V
on this pin is used as a reference for ADC and DAC.
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
DD(3V3)
but should be isolated to minimize noise and error. The level
2
C-bus is floating and does not disturb the I
DD(3V3)
Flashless 16-bit/32-bit microcontroller
but should be isolated to minimize noise and
LPC2420/2460
2
C-bus lines. Open-drain
© NXP B.V. 2011. All rights reserved.
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