Rainbow-electronics MAX9135 Bedienungsanleitung PDF herunterladen (Seite 12)

MAX9132/MAX9134/MAX9135

Programmable, High-Speed, Multiple

Input/Output LVDS Crossbar Switches

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multiple data bytes are transmitted before a STOP con-

dition is detected, these bytes are generally stored in

subsequent MAX9132/MAX9134/MAX9135 internal reg-

isters because the command byte address generally

autoincrements (Table 1).

Data Format for Reading from the Slave

The MAX9132/MAX9134/MAX9135 are read using the

devices’ internally stored command bytes as an

address pointer, the same way the stored command

byte is used as an address pointer for a write. The

pointer does not autoincrement after each data byte is

read. Initiate a read by writing the command byte to the

proper slave address (Figure 2), then send the device’s

slave address with the R/W bit set to 1. The slave now

responds with the contents of the requested register

(Figure 2).

LIN Interface

The LIN interface is a low-speed, low-cost interface used

in slow control signal traffic in automotive applications.

This device is the slave node in the LIN bus cluster and

is designed based on the LIN Rev. 1.3 specification. The

LIN master sends data to the MAX9132/MAX9134/

FRAME SLOT

FRAME

RESPONSE

SPACE

INTER-

FRAME

SPACE

RESPONSEHEADER

BREAK SYNC PROTECTED

INDENTIFIER

TRANSMITTED

FROM MASTER

TRANSMITTED

FROM A MASTER OR SLAVE

*N = 2 FOR WRITE

AND 4 FOR READ

DATA 1 DATA 2 DATA N* CHECKSUM

Figure 3. LIN Bus Signal Format

READ FORMATWRITE FORMAT

0x00 0x010x01

DATA 1 DATA 2 DATA 1 DATA 2 DATA 3 DATA 4

0x02 0x02 0xFF

Figure 4. LIN Write and Read Data Frame

PIN ADDRESS

AS0 AS1 A[7:5] A4 A3 A2 A1 A0

ADDRESS (HEX)

Low Low 101 0 0 0 0 R/W 0xA0

Low Open 101 0 0 0 1 R/W 0xA2

Low High 101 0 0 1 0 R/W 0xA4

Open Low 101 0 0 1 1 R/W 0xA6

Open Open 101 0 1 0 0 R/W 0xA8

Open High 101 0 1 0 1 R/W 0xAA

High Low 101 0 1 1 0 R/W 0XAC

High Open 101 0 1 1 1 R/W 0xAE

High High 101 1 0 0 0 R/W 0xB0

Table 3. I

C Slave Addresses

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

MAX9132/MAX9134/MAX9135 1

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