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 23 of 80
NXP Semiconductors
LPC3220/30/40/50
16/32-bit ARM microcontrollers
[1] The VDD_IOA, VDD_IOB, VDD_IOC, and VDD_IOD supply domains can be operated at a voltage
independent of the other domains as long as all pins connected to the same peripheral are at the same
voltage level. There are two special cases for determining supply domain voltages (for details see
application note AN10777):
a) Ethernet configured in MII mode: VDD_IOD must be the same as VDD_IOB.
b) UART 3 when used with hardware flow control or when sharing an RS-232 transceiver with another
UART: VDD_IOA must be the same as VDD_IOD.
VDD_IOA
[1]
1.7 V to 1.95 V or
2.7 V to 3.6 V
VDD_IOA Peripheral supply.
VDD_IOB
[1]
1.7 V to 1.95 V or
2.7 V to 3.6 V
VDD_IOB Peripheral supply.
VDD_IOC
[1]
1.7 V to 1.95 V or
2.3 V to 3.6 V
VDD_IOC Peripheral supply.
VDD_IOD
[1]
1.7 V to 1.95 V or
2.7 V to 3.6 V
VDD_IOD Peripheral supply.
Table 6. Supply domains
Supply domain Voltage range Related supply
pins
Description