LNBH2 STMicroelectronics, LNBH2 Datasheet - Page 7

• Manufacturer Part Number: LNBH2
• Description: LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
• Manufacturer: STMicroelectronics

Figure 2 : TIMING DIAGRAM ON I
Figure 3 : ACKNOWLEDGE ON I
LNBH21 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
S
R, W
MSB
PCL
MSB
0
0
R, W
0
TTX
CHIP ADDRESS
1
0
R, W
TEN
0
2
C BUS
2
C BUS
0
LSB
R/W ACK
R, W
LLC
MSB
VSEL
R, W
R, W
EN
DATA
OTF
R
LSB
LNBH21
ACK
LSB
OLF
R
7/20
P