LPC2364 datasheet(12/48 Pages) PHILIPS

12 / 48 page

LPC2364_66_68_1

Preliminary data sheet

Rev. 01 — 22 September 2006

12 of 48

Philips Semiconductors

LPC2364/2366/2368

Fast communication chip

7. Functional description

7.1 Architectural overview

The LPC2364/66/68 microcontroller consists of an ARM7TDMI-S CPU with emulation

support, the ARM7 Local Bus for closely coupled, high speed access to the majority of

on-chip memory, the AMBA Advanced High-performance Bus (AHB) interfacing to high

speed on-chip peripherals, and the AMBA Advanced Peripheral Bus (APB) for connection

to other on-chip peripheral functions. The microcontroller permanently configures the

ARM7TDMI-S processor for little-endian byte order.

TDI

TDI — Test Data in for JTAG interface.

TMS

TMS — Test Mode Select for JTAG interface.

TRST

TRST — Test Reset for JTAG interface.

TCK

TCK — Test Clock for JTAG interface.

RTCK

100

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 — LOW on this pin indicates LPC2364/66/68 being in Reset state.

RESET

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.

Input to the oscillator circuit and internal clock generator circuits.

Output from the oscillator amplifier.

RTCX1

Input to the RTC oscillator circuit.

RTCX2

Output from the RTC oscillator circuit.

VSS

15, 31,

41, 55,

72, 97,

Ground: 0 V reference

VSSA

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,

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

VDCDC(3V3)

13, 42,

3.3 V DC-to-DC Power Supply: This is the power supply for the on-chip DC-to-DC

converter only. If the DC-to-DC is not used, these pins must be unconnected.

VDDA

Analog 3.3 V Power Supply: This should be nominally the same voltage as VDD but

should be isolated to minimize noise and error. This voltage is used to power the ADC

and DAC.

VREF

ADC Reference: This should be nominally the same voltage as VDD but should be

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

and DAC.

VBAT

RTC Power Supply: 3.3 V on this pin supplies the power to the RTC.

Table 3.

Pin description …continued

Symbol

location

Type

Description

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