MAX9526(2010) View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX9526
(Rev.:2010)

Low-Power, High-Performance NTSC/PAL Video Decoder

Maxim Integrated 

Low-Power, High-Performance

NTSC/PAL Video Decoder

SDA

tSU, DAT

tLOW

tHD, DAT

SCL

tHD, STA

START

CONDITION

tHIGH

tR

tF

Figure 9. I2C Serial Interface Timing Diagram

tSU, STA

tHD, STA

REPEATED

START CONDITION

tBUF

tSP tSU, STO

STOP

START

CONDITION CONDITION

S

SCL

Sr

P

SDA

Figure 10. START, STOP, and REPEATED START Conditions

START

CONDITION

SCL

1

2

SDA

Figure 11. Acknowledge

CLOCK PULSE FOR

ACKNOWLEDGMENT

8

9

NOT ACKNOWLEDGE

ACKNOWLEDGE

Read Data Format

Send the slave address with the R/W bit set to 1 to initi-

ate a read operation. The MAX9526 acknowledges

receipt of its slave address by pulling SDA low during

the 9th SCL clock pulse. A START command followed

by a read command resets the address pointer to reg-

ister 0x00.

The first byte transmitted from the MAX9526 is the con-

tents of register 0x00. Transmitted data is valid on the

rising edge of SCL. The address pointer autoincre-

ments after each read data byte. This autoincrement

feature allows all registers to be read sequentially within

one continuous frame. A STOP condition can be issued

after any number of read data bytes. If a STOP condi-

tion is issued followed by another read operation, the

first data byte to be read is from register 0x00.

The address pointer can be preset to a specific register

before a read command is issued. The master presets

the address pointer by first sending the MAX9526’s

slave address with the R/W bit set to 0 followed by the

register address. A REPEATED START condition is then

sent followed by the slave address with the R/W bit set

to 1. The MAX9526 then transmits the contents of the

specified register. The address pointer autoincrements

after transmitting the first byte.

The master acknowledges receipt of each read byte

during the acknowledge clock pulse. The master must

acknowledge all correctly received bytes except the

last byte. The final byte must be followed by a not

acknowledge from the master and then a STOP condi-

tion. Figure 14 illustrates the frame format for reading

one byte from the MAX9526. Figure 15 illustrates the

frame format for reading multiple bytes from the

MAX9526.

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