UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
278 of 1269
NXP Semiconductors
UM10503
Chapter 14: LPC43xx Pin configuration
ADC pins
ADC0_0/
ADC1_0/DAC
E3
B6
8
I; IA
I
ADC input channel 0. Shared between 10-bit ADC0/1 and DAC.
ADC0_1/
ADC1_1
C3
C4
4
I; IA
I
ADC input channel 1. Shared between 10-bit ADC0/1.
ADC0_2/
ADC1_2
A4
B3
206
I; IA
I
ADC input channel 2. Shared between 10-bit ADC0/1.
ADC0_3/
ADC1_3
B5
B4
200
I; IA
I
ADC input channel 3. Shared between 10-bit ADC0/1.
ADC0_4/
ADC1_4
C6
A5
199
I; IA
I
ADC input channel 4. Shared between 10-bit ADC0/1.
ADC0_5/
ADC1_5
B3
C3
208
I; IA
I
ADC input channel 5. Shared between 10-bit ADC0/1.
ADC0_6/
ADC1_6
A5
A4
204
I; IA
I
ADC input channel 6. Shared between 10-bit ADC0/1.
ADC0_7/
ADC1_7
C5
B5
197
I; IA
I
ADC input channel 7. Shared between 10-bit ADC0/1.
RTC
RTC_ALARM
A11
A10
186
-
O
RTC controlled output.
RTCX1
A8
A8
182
-
I
Input to the RTC 32 kHz ultra-low power oscillator circuit.
RTCX2
B8
A7
183
-
O
Output from the RTC 32 kHz ultra-low power oscillator circuit.
SAMPLE
B9
B8
-
O
O
Event monitor sample output.
Crystal oscillator pins
XTAL1
D1
C1
18
-
I
Input to the oscillator circuit and internal clock generator circuits.
XTAL2
E1
D1
19
-
O
Output from the oscillator amplifier.
Power and ground pins
USB0_VDDA
3V3_DRIVER
F3
E3
24
-
-
Separate analog 3.3 V power supply for driver.
USB0
_VDDA3V3
G3
F3
25
-
-
USB 3.3 V separate power supply voltage.
USB0_VSSA
_TERM
H3
G3
27
-
-
Dedicated analog ground for clean reference for termination
resistors.
USB0_VSSA
_REF
G1
F1
31
-
-
Dedicated clean analog ground for generation of reference currents
and voltages.
VDDA
B4
A6
198
-
-
Analog power supply and ADC reference voltage.
VBAT
B10
B9
184
-
-
RTC power supply: 3.3 V on this pin supplies power to the RTC.
VDDREG
F10,
F9,
L8,
L7
D8,
E8
135,
188,
195,
82,
33
-
Main regulator power supply. Tie the VDDREG and VDDIO pins to a
common power supply to ensure the same ramp-up time for both
supply voltages.
VPP
E8
-
-
-
-
OTP programming voltage.
Table 130. LPC4357/53 Pin description
…continued
Pin name
L
B
GA
256
TFBGA18
0
LQ
FP2
0
8
Re
set st
ate
[2
]
Ty
p
e
Description