 2003 Microchip Technology Inc.

DS21176D-page 13

24LC41A

7.4

Noise Protection

Both the DDC Monitor Port and Microcontroller Access

below 1.5 volts at nominal conditions.

The VCLK, DSCL, MSCL, DSDA, and MSDA inputs

have Schmitt Trigger and filter circuits which suppress

noise spikes to assure proper device operation even on

a noisy bus.

FIGURE 7-1:

CURRENT ADDRESS READ

FIGURE 7-2:

RANDOM READ

FIGURE 7-3:

SEQUENTIAL READ

SP

BUS ACTIVITY

MASTER

DSDA or

BUS ACTIVITY

S

T

A

R

T

CONTROL

BYTE

DATA n

A

C

K

N

O

A

C

K

S

T

O

P

MSDA LINE

S

P

S

BUS ACTIVITY

MASTER

MSDA LINE

BUS ACTIVITY

S

T

A

R

T

S

T

O

P

CONTROL

BYTE

WORD

ADDRESS

DATA n

A

C

K

A

C

K

N

O

A

C

K

CONTROL

BYTE

A

C

K

S

T

A

R

T

P

DSDA or

BUS ACTIVITY

S

T

O

P

CONTROL

BYTE

DATA n

A

C

K

N

O

A

C

K

A

C

K

A

C

K

A

C

K

DATA n + 1

DATA n + 2

DATA n + X

BUS ACTIVITY

MASTER

MSDA LINE