UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
280 of 1269
NXP Semiconductors
UM10503
Chapter 14: LPC43xx Pin configuration
[6]
5 V tolerant transparent analog pad.
[7]
For maximum load C
L
= 6.5
F and maximum resistance R
pd
= 80 k
, the VBUS signal takes about 2 s to fall from VBUS = 5 V to VBUS
= 0.2 V when it is no longer driven.
[8]
Transparent analog pad. Not 5 V tolerant.
[9]
Pad provides USB functions; 5 V tolerant if VDDIO present; if VDDIO not present, do not exceed 3.6 V. It is designed in accordance with
the USB specification, revision 2.0 (Full-speed and Low-speed mode only).
[10] Open-drain 5 V tolerant digital I/O pad, compatible with I
2
C-bus Fast Mode Plus 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.
[11] 5 V tolerant pad with 20 ns glitch filter; provides digital I/O functions with open-drain output with weak pull-up resistor and hysteresis.
[12] On the TFBGA100 and LQFP208 packages, VPP is internally connected to VDDIO.
[13] On the LQFP208 package, VSSIO and VSS are connected to a common ground plane.