LPC2361 datasheet(12/50 Pages) NXP

12 / 50 page

LPC2361_62_3

Product data sheet

Rev. 03 — 11 November 2008

12 of 50

NXP Semiconductors

LPC2361/62

Single-chip 16-bit/32-bit MCU

[1]

5 V tolerant pad providing digital I/O functions with TTL levels and hysteresis.

[2]

5 V tolerant pad providing digital I/O functions (with TTL levels and hysteresis) and analog input. When conﬁgured as a DAC input,

digital section of the pad is disabled.

P4[28]/MAT2[0]/

TXD3

82[1]

I/O

P4[28] — General purpose digital input/output pin.

MAT2[0] — Match output for Timer 2, channel 0.

TXD3 — Transmitter output for UART3.

P4[29]/MAT2[1]/

RXD3

85[1]

I/O

P4[29] — General purpose digital input/output pin.

MAT2[1] — Match output for Timer 2, channel 1.

RXD3 — Receiver input for UART3.

TDO

1[1]

TDO — Test Data out for JTAG interface.

TDI

2[1]

TDI — Test Data in for JTAG interface.

TMS

3[1]

TMS — Test Mode Select for JTAG interface.

TRST

4[1]

TRST — Test Reset for JTAG interface.

TCK

5[1]

TCK — Test Clock for JTAG interface. This clock must be slower than 1

⁄

6 of the CPU

clock (CCLK) for the JTAG interface to operate

RTCK

100[1]

I/O

RTCK — JTAG interface control signal.

Note: LOW on this pin while RESET is LOW enables ETM pins (P2[9:0]) to operate

as trace port after reset.

RSTOUT

RSTOUT — This is a 3.3 V pin. LOW on this pin indicates LPC2361/62 being in

Reset state.

RESET

17[7]

External reset input: A LOW on this pin resets the device, causing I/O ports and

peripherals to take on their default states, and processor execution to begin at

address 0. TTL with hysteresis, 5 V tolerant.

XTAL1

22[8]

Input to the oscillator circuit and internal clock generator circuits.

XTAL2

23[8]

Output from the oscillator ampliﬁer.

RTCX1

16[8]

Input to the RTC oscillator circuit.

RTCX2

18[8]

Output from the RTC oscillator circuit.

VSS

15, 31,

41, 55,

72, 97,

83[9]

ground: 0 V reference.

VSSA

11[10]

analog ground: 0 V reference. This should nominally be the same voltage as VSS,

but should be isolated to minimize noise and error.

VDD(3V3)

28, 54,

71,

96[11]

3.3 V supply voltage: This is the power supply voltage for the I/O ports.

VDD(DCDC)(3V3)

13, 42,

84[12]

3.3 V DC-to-DC converter supply voltage: This is the supply voltage for the

on-chip DC-to-DC converter only.

VDDA

10[13]

analog 3.3 V pad supply voltage: This should be nominally the same voltage as

VDD(3V3) but should be isolated to minimize noise and error. This voltage is used to

power the ADC and DAC.

VREF

12[13]

ADC reference: This should be nominally the same voltage as VDD(3V3) but should

be isolated to minimize noise and error. Level on this pin is used as a reference for

ADC and DAC.

VBAT

19[13]

RTC power supply: 3.3 V on this pin supplies the power to the RTC peripheral.

Table 3.

Pin description …continued

Symbol

Type

Description

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