Datasheet
LPC3220_30_40_50 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 2.1 — 24 June 2014 22 of 80
NXP Semiconductors
LPC3220/30/40/50
16/32-bit ARM microcontrollers
[1] The PWM2_CTRL register controls this pin function (see LPC32x0 User manual).
[1] See LPC32x0 User manual for details.
VSS_PLLUSB R16 - power Ground for USB PLL
VSS_RTCCORE
L14 - power Ground for RTC
VSS_RTCOSC
P18 - power Ground for RTC oscillator
Table 4. Pin description
…continued
Symbol Pin Power supply
domain
Type Description
Table 5. Digital I/O pad types
[1]
Parameter Abbreviation
I/O type I = input.
O = output.
I/O = bidirectional.
I/O T = bidirectional or high impedance.
Pin detail BK: pin has a bus keeper function that weakly retains the last logic
level driven on an I/O pin.
Bus keeper current for different I/O pin voltages:
0 V= 1 A (max)
VDD_x = 1 A (max)
2/3 VDD_x = 55 A (max)
1/3 VDD_x = 60 A (max)
PU: pin has a nominal 50 A internal pull-up connected.
PD: pin has a nominal 50 A internal pull-down connected.
P: pin has programmable input characteristics.
Table 6. Supply domains
Supply domain Voltage range Related supply
pins
Description
VDD_CORE 0.9 V to 1.39 V VDD_CORE Core power domain.
VDD_COREFXD 1.2 V VDD_COREFXD Fixed 1.2 V supply for digital portion of
the analog block.
other core
domains
1.2 V VDD_PLL397,
VDD_PLLHCLK,
VDD_PLLUSB,
VDD_FUSE,
VDD_OSC
1.2 V supplies, tied to
VDD_COREFXD.
VDD_RTC 0.9 V to 1.39 V VDD_RTC,
VDD_RTCCORE,
VDD_RTCOSC
RTC supply domain. Can be
connected to a battery backed-up
power source.
VDD_AD 2.7 V to 3.6 V VDD_AD 3.3 V supply for ADC and touch
screen.
VDD_EMC 1.7 V to 1.95 V
2.3 V to 2.7 V
2.7 V to 3.6 V
VDD_EMC External memory interface IO pins in
1.8 V range, 2.5 V range, or 3.3 V
range.