USB97CFDC2-01 datasheet(9/24 Pages) SMSC

9 / 24 page

SMSC DS – USB97CFDC2-01

Page 9

Rev. 02-27-07

DATASHEET

PIN NO.

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

USB INTERFACE

USB Bus

Data

USB-

USB+

IO-U

These pins connect to the USB data signals

through 33 ohm series resistors. The USB+ line

should be pulled up with a 5%, 1.5K ohm resistor

to indicate that this is a high speed USB device.

USB

Transceiver

Supply

AVDD

This is the 3.3V supply to the internal USB

transceiver.

USB

Transceiver

Ground

AGND

This is the supply ground for the internal USB

transceiver.

PROGRAM MEMORY INTERFACE

38-35

Program

Memory Data

Bus/Option

Select

FD[3:0]/

OPT[3:0]

IO8

These signals are used to transfer data between

the internal 8051 and the external program

memory when operating in external program

memory mode (See ROMEN pin). When operating

from internal program memory, the OPT3 pin must

be tied high thru a resistor and the OPT[2:0] pins

tied

low

thru

resistor

(See

configuration

description section). These pins are not driven

while the USB97CFDC2-01 is in SUSPEND mode

and internal ROM mode is active. They are driven

while in SUSPEND in external ROM mode..

Program

Memory Data

Bus/EEPROM

Input

FD4/IN0

IO8

This signal is used to transfer data between the

internal 8051 and the external program memory

when operating in external program memory mode

(See ROMEN pin). When operating from internal

program memory, this pin is the input data from an

external

serial

EEPROM

that

contains

manufacturer specific ID and string information, as

required by the USB specification, and drive

options.

This

not

driven

while

the

USB97CFDC2-01 is in SUSPEND mode and

internal ROM mode is active. It is driven while in

SUSPEND in external ROM mode...

33-31

Program

Memory Data

Bus/EEPROM

Output

FD[7:5]/

OUT[2:0]

IO8

This signal is used to transfer data between the

internal 8051 and the external program memory

when operating in external program memory mode

(See ROMEN pin). When operating from internal

program memory, these pins are the output data

and strobes to an external serial EEPROM that

contains manufacturer specific ID and string

information, as required by the USB specification,

and drive options. These pins are driven while the

USB97CFDC2-01 is in SUSPEND mode.

50, 53, 54,

49, 57, 29,

56, 55, 48-

44, 42-40,

Flash Memory

Address Bus

FA[15:0]

These signals address memory locations within the

FLASH memory.

Flash Memory

Read Strobe

nFRD

Flash ROM Read; active low

Flash Memory

Chip Select

nFCE

Flash ROM Chip Select; active low

MISCELLANEOUS

Crystal

Input/External

Clock Input

XTAL1/

CLKIN

ICLKx

14.318Mhz Crystal or clock input.

This pin can be connected to one terminal of the

crystal or can be connected to an external

14.318Mhz clock when a crystal is not used.

USB97CFDC2-01 Scheda tecnica(PDF) 9 Page - SMSC Corporation

USB97CFDC2-01 Scheda tecnica(HTML) 9 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Scheda tecnica Scarica

Link URL