LPC1313 datasheet(14/53 Pages) NXP

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LPC1311_13_42_43_1

Product data sheet

Rev. 01 — 11 December 2009

14 of 53

NXP Semiconductors

LPC1311/13/42/43

32-bit ARM Cortex-M3 microcontroller

[1]

5 V tolerant pad providing digital I/O functions with conﬁgurable pull-up/pull-down resistors and conﬁgurable hysteresis.

[2]

I2C-bus pads compliant with the I2C-bus speciﬁcation for I2C standard mode and I2C Fast-mode Plus.

[3]

5 V tolerant pad providing digital I/O functions with conﬁgurable pull-up/pull-down resistors, conﬁgurable hysteresis, and analog input.

When conﬁgured as a ADC input, digital section of the pad is disabled, and the pin is not 5 V tolerant.

[4]

Pad provides USB functions. It is designed in accordance with the USB speciﬁcation, revision 2.0 (Full-speed and Low-speed mode

only).

[5]

Tie together VDD(3V3) and VDD(IO) externally. If separate supplies are used for VDD(3V3) and VDD(IO), ensure that the voltage difference

between both supplies is smaller than or equal to 0.5 V.

[6]

When the system oscillator is not used, connect XTALIN and XTALOUT as follows: XTALIN can be left ﬂoating or can be grounded

(grounding is preferred to reduce susceptibility to noise). XTALOUT should be left ﬂoating.

Functional description

7.1 Architectural overview

The ARM Cortex-M3 includes three AHB-Lite buses: the system bus, the I-code bus, and

the D-code bus (see Figure 1). The I-code and D-code core buses are faster than the

system bus and are used similarly to TCM interfaces: one bus dedicated for instruction

fetch (I-code) and one bus for data access (D-code). The use of two core buses allows for

simultaneous operations if concurrent operations target different devices.

7.2 ARM Cortex-M3 processor

The ARM Cortex-M3 is a general purpose, 32-bit microprocessor, which offers high

performance and very low power consumption. The ARM Cortex-M3 offers many new

features, including a Thumb-2 instruction set, low interrupt latency, hardware divide,

PIO1_10/AD6/

CT16B1_MAT1

20[3]

I/O

PIO1_10 — General purpose digital input/output pin.

AD6 — A/D converter, input 6.

CT16B1_MAT1 — Match output 1 for 16-bit timer 1.

PIO1_11/AD7

27[3]

I/O

PIO1_11 — General purpose digital input/output pin.

AD7 — A/D converter, input 7.

PIO2_0/DTR

1[1]

I/O

PIO2_0 — General purpose digital input/output pin.

DTR — Data Terminal Ready output for UART.

PIO3_2

28[1]

I/O

PIO3_2 — General purpose digital input/output pin.

PIO3_4

13[1]

I/O

PIO3_4 — General purpose digital input/output pin (LPC1311/13 only).

PIO3_5

14[1]

I/O

PIO3_5 — General purpose digital input/output pin (LPC1311/13 only).

USB_DM

13[4]

I/O

USB_DM — USB bidirectional D

− line (LPC1342/43 only).

USB_DP

14[4]

I/O

USB_DP — USB bidirectional D+ line (LPC1342/43 only).

VDD(IO)

6[5]

3.3 V input/output supply voltage.

VDD(3V3)

29[5]

3.3 V supply voltage to the internal DC-DC converter and the ADC. Also

used as the ADC reference voltage.

XTALIN

4[6]

Input to the oscillator circuit and internal clock generator circuits. Input

voltage must not exceed 1.8 V.

XTALOUT

5[6]

Output from the oscillator ampliﬁer.

VSS

Thermal pad. Connect to ground.

Table 4.

LPC1311/13/42/43 HVQFN33 pin description table …continued

Symbol

Type

Description

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