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LPC1225FBD48321 Datasheet(PDF) 14 Page - NXP Semiconductors

Part No. LPC1225FBD48321
Description  32-bit ARM Cortex-M0 microcontroller; up to 128 kB flash and 8 kB SRAM
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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LPC1225FBD48321 Datasheet(HTML) 14 Page - NXP Semiconductors

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LPC122X
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Objective data sheet
Rev. 1.1 — 21 February 2011
14 of 60
NXP Semiconductors
LPC122x
32-bit ARM Cortex-M0 microcontroller
[1]
Pin state at reset for default function: I = Input; O = Output; PU = internal pull-up enabled; IA = inactive, no pull-up/down enabled.
[2]
3.3 V tolerant, digital I/O pin; default: pull-up enabled, no hysteresis.
[3]
I2C-bus pins; 5 V tolerant; open-drain; default: no pull-up/pull-down; no hysteresis.
[4]
3.3 V tolerant, digital I/O pin with RESET function; default: pull-up enabled, no hysteresis. An external pull-up resistor is required on this
pin for the Deep power-down mode.
[5]
3.3 V tolerant, digital I/O pin with analog function; default: pull-up enabled, no hysteresis.
[6]
3.3 V tolerant, digital I/O pin with analog function and WAKEUP function; default: pull-up enabled, no hysteresis.
[7]
3.3 V tolerant, high-drive digital I/O pin; default: pull-up enabled, no hysteresis.
To enable a peripheral function, find the corresponding port pin, or select a port pin if the
function is multiplexed, and program the port pin’s IOCONFIG register to enable that
function. The primary SWD functions and RESET are the default functions on their pins
after reset, all other digital pins default to GPIO.
VDD(IO)
47 63
-
I
-
Input/output supply voltage.
VDD(3V3)
44 56
-
I
-
3.3 V supply voltage to the internal regulator and the ADC. Also
used as the ADC reference voltage.
VSSIO
48 64
-
I
-
Ground.
VSS
43 55
-
I
-
Ground.
Table 3.
LPC122x pin description …continued
Symbol
Start
logic
input
Type Reset
state
[1]
Description
Table 4.
Pin multiplexing
Peripheral
Function
Type
Available on ports:
Analog comparators
ROSC
I/O
PIO0_29
-
-
ACMP0_I0
I
PIO0_19
-
-
ACMP0_I1
I
PIO0_20
-
-
ACMP0_I2
I
PIO0_21
-
-
ACMP0_I3
I
PIO0_22
-
-
ACMP0_O
O
PIO0_27
-
-
ACMP1_I0
I
PIO0_23
-
-
ACMP1_I1
I
PIO0_24
-
-
ACMP1_I2
I
PIO0_25
-
-
ACMP1_I3
I
PIO0_26
-
-
ACMP1_O
O
PIO0_28
-
-
ADC
AD0
I
PIO0_30
-
-
AD1
I
PIO0_31
-
-
AD2
I
PIO1_0
-
-
AD3
I
PIO1_1
-
-
AD4
I
PIO1_2
-
-
AD5
I
PIO1_3
-
-
AD6
I
PIO1_4
-
-
AD7
I
PIO1_5
-
-


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