NXP Semiconductors LPC2917 Modulation and sampling control subsystem, LIN pin description

NXP Semiconductors

DRAFT	D	D		AFT
	RAFT	RAFT AFT
			DR	DR

DLPC2917/19

ARM9 microcontrollerRAFT withDRAFTCANDRAFTand LINDRAFT

•Complete LIN 2.0 message handling and transfer

•One interrupt per LIN message

•Slave response time-out detection

•Programmable sync-break length

•Automatic sync-field and sync-break generation

•Programmable inter-byte space

•Hardware or software parity generation

•Automatic checksum generation

•Fault confinement

•Fractional baud-rate generator

T DRAFT	T
DRA	DRA DR
F	F
DRAFT DRAFT DRAF
DRAFT DRAFT
	DRAFT	D
	DRA

8.6.2LIN pin description

The two LIN 2.0 master controllers in the LPC2917/19 have the pins listed below. The LIN pins are combined with other functions on the port pins of the LPC2917/19. Table 19 shows the LIN pins. For more information see Ref. 1 subsection 3.43, LIN master controller.

Table 19. LIN controller pins

Symbol	Direction	Description
LIN0/1 TXDL	out	LIN channel 0/1 transmit data output
LIN0/1 RXDL	in	LIN channel 0/1 receive data input

8.7Modulation and sampling control subsystem

8.7.1Overview

The Modulation and Sampling Control Subsystem (MSCSS) in the LPC2917/19 includes four Pulse-Width Modulators (PWMs), three10-bit successive approximation Analog-to-Digital Converters (ADCs) and two timers.

The key features of the MSCSS are:

•Two 10-bit, 400 ksamples/s, 8-channel ADCs with 3.3 V inputs and various trigger- start options

•Four 6-channel PWMs (Pulse-Width Modulators) with capture and trap functionality

•Two dedicated timers to schedule and synchronize the PWMs and ADCs

8.7.2Description

The MSCSS contains Pulse-Width Modulators (PWMs), Analog-to-Digital Converters (ADCs) and timers.

Figure 7 provides an overview of the MSCSS. An AHB-to-VPB bus bridge takes care of communication with the AHB system bus. Two internal timers are dedicated to this subsystem. MSCSS timer 0 can be used to generate start pulses for the ADCs and the first PWM. The second timer (MSCSS timer 1) is used to generate ‘carrier’ signals for the PWMs. These carrier patterns can be used, for example, in applications requiring current

LPC2917_19_1 © NXP B.V. 2007. All rights reserved.

Preliminary data sheet Rev. 1.01 — 15 November 2007 31 of 68