CAM35C44 datasheet(4/50 Pages) SMSC

4 / 50 page

ARCHITECTURE

There are six basic architectural components in

the CAM35C44: the multihost CPU interface, the

IrCC

2.0,

clock

generator,

configuration

registers,

power

management,

and

general

purpose I/O (

FIGURE 1).

The multihost CPU interface is capable of

supporting several bus configurations; including,

a non-multiplexed ISA-style address and data

bus, and a multiplexed address/data bus with

selectable read/write command options.

The

multihost CPU interface includes support for

Hitachi and Mitsubishi microcontrollers.

The

IrCC

2.0

multi-protocol

serial

communications controller that incorporates an

ACE

16C550A

UART

and

Synchronous

Communications Engine (SCE).

Refer to the

SMSC Infrared Communications Controller 2.0

specification for more information.

The clock generator provides connections for a

24MHz crystal or an external clock source. The

24MHz clock directly drives the ACE block. An

internal PLL is used for data rates above

115.2Kbps.

Power management in the CAM35C44 includes

various power down modes and an infrared

wake-up option.

The general purpose I/O

interface provides generic I/O programming

capabilities.

FIGURE 1 - CAM35C44 BLOCK DIAGRAM

MULTIHOST

CPU

INTERFACE

SD[7:0]/AD[7:0]

SA[1:0]/GPIO[4:3]

SA[4:2]/BS[2:0]

nCS

AEN

ASTRB

IOCHRDY

nNOWS

RESET_DRV

IRQ

DRQ

nDACK

nIOR/RW

nIOW/DSTRB

CLOCK

GEN

GENERAL

PURPOSE

I/O

GPIO[2:0]

POWER

MGMT

CONFIGURATION

REGISTERS

IRCC 2.0

IRRX

IRTX

IRMODE/IRRX3

POWER

RXD/IRRX

TXD/IRTX

CONTROL

DATA

ADDRESS

X1/CLK1

PWRGD

VCC[2:1],VSS[3:1],

VIO

HS1

HS0

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