Rainbow-electronics MAX7473 Bedienungsanleitung PDF herunterladen (Seite 11)

tion). After receiving the proper address, the

MAX7472/MAX7473 (slave) issue an ACK by pulling

SDA low for one clock cycle.

The MAX7472/MAX7473 slave address consists of 5

fixed bits A6–A2 (set to 10010) followed by 2 pin-pro-

grammable bits A1 and A0. The most significant address

bit (A6) is transmitted first, followed by the remaining

bits. Addresses A1 and A0 can also be driven dynami-

cally if required, but the values must be stable when they

are expected in the address sequence.

Command Byte (Write Cycle)

A write cycle begins with the bus master issuing a

START condition followed by 7 address bits (Figure 5)

and a write bit (R/W = 0). After successfully receiving

its address, the MAX7472/MAX7473 (slave) issue an

ACK. The MAX7472/MAX7473 recognize the next byte

after a successfully received address as the command

byte (Table 3).

Use the command byte to configure the MAX7472/

MAX7473. While most of the commands listed in Table

3 modify the functionality of the MAX7472/

MAX7473, some commands prepare the device for fur-

ther data transfers (see the

Control/Status Register

Frequency Register

, and

Channel-Selection Register

sections.) When the write cycle is prematurely aborted,

the register is not updated. Figures 6 and 7 show

examples of write sequences.

MAX7472/MAX7473

HDTV Anti-Aliasing Filters with Triple-Input Mux

______________________________________________________________________________________ 11

SDA

SCL

1 0 1 0 A1 A00 R/W

MSB LSB

ACK

Figure 5. Slave-Address Byte Definition

SDA

SCL

1 0 0 1 0 A1 A0 R/W

C7 C6 C5 C4 C3 C2 C1 C0

ACK ACK

OUTINOUTIN TO MAX7472/MAX7473

SDA (CONT)

SDA

DIRECTION

SDA

DIRECTION

SCL (CONT)

F7 F6 F5 F4 F3 F2 F1 ACK

OUT

IN IN

START

STOP

COMMAND WORD C7–C0 IS 00010010.

00010010

Figure 6. Write Sequence to Update the Frequency Register

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 17 18 19

MAX7472/MAX7473 1

Kommentare zu diesen Handbüchern

Keine Kommentare

Rainbow-electronics MAX7473 Bedienungsanleitung Seite 11

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Sensoren Rainbow-electronics MAX7473