Nxp Semiconductors LPC2917 ユーザーズマニュアル

LPC2917_19_1

© NXP B.V. 2007. All rights reserved.

The general subsystem is clocked by CLK_SYS_GESS, see 

The key features are:

Identification of product

Identification of features enabled

The Chip/Feature ID (CFID) module contains registers which show and control the 
functionality of the chip. It contains an ID to identify the silicon, and also registers 
containing information about the features enabled or disabled on the chip.

The CFID has no external pins.

The system control unit takes care of system-related functions.The key feature is 
configuration of the I/O port-pins multiplexer.

The system control unit defines the function of each I/O pin of the LPC2917/19. The I/O 
pin configuration should be consistent with peripheral function usage. 

The SCU has no external pins.

The event router provides bus-controlled routing of input events to the vectored interrupt 
controller for use as interrupt or wake-up signals.

Key features:

Up to 24 level-sensitive external interrupt pins, including CAN, LIN and RxD wake-up 
features plus three internal event sources

Input events can be used as interrupt source either directly or latched (edge-detected) 

Direct events disappear when the event becomes inactive

Latched events remain active until they are explicitly cleared

Programmable input level and edge polarity

Event detection maskable