LNBEH21 datasheet(7/22 Pages) STMICROELECTRONICS

部件名	LNBEH21

功能描述	LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE

PDF	22 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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7 / 22 page

LNBEH21

7/22

Figure 6: Acknowledge On I2C Bus

LNBEH21 SOFTWARE DESCRIPTION

INTERFACE PROTOCOL

The interface protocol comprises:

- A start condition (S)

- A chip address byte = hex 10 / 11 (the LSB bit determines read(=1)/write(=0) transmission)

- A sequence of data (1 byte + acknowledge)

- A stop condition (P)

ACK= Acknowledge; S = Start; P = Stop; R/W = Read/Write

SYSTEM REGISTER (SR, 1 BYTE)

R,W = read and write bit; R = Read-only bit

All bits reset to 0 at Power-On

TRANSMITTED DATA (I2C BUS WRITE MODE)

When the R/W bit in the chip address is set to 0, the main µP can write on the System Register (SR) of the

LNBEH21 via I2C bus. Only 6 bits out of the 8 available can be written by the µP, since the remaining 2 are

left to the diagnostic flags, and are read-only.

CHIP ADDRESS

DATA

MSB

LSB

MSB

LSB

0001000

R/W ACK

ACK

MSB

LSB

R, W

PCL

TTX

LLC

VOM

OTF

OLF

LNBEH21 数据表(PDF) 7 Page - STMicroelectronics

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