LMH0307GR/NOPB National Semiconductor, LMH0307GR/NOPB Datasheet - Page 7

• Manufacturer Part Number: LMH0307GR/NOPB
• Description: IC CBL DVR DUAL 3G HD/SD 25-UARY
• Manufacturer: National Semiconductor
• Type: Driverr

Specifications of LMH0307GR/NOPB

• Applications: Amplifiers, Video Distribution
• Mounting Type: Surface Mount
• Package / Case: 25-Micro Array
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMH0307GR

SMBus TRANSACTIONS
The device supports WRITE and READ transactions. See
Register Description table for register address, type (Read/
Write, Read Only), default value and function information.
WRITING A REGISTER
To write a register, the following protocol is used (see SMBus
2.0 specification).
1.
2.
3.
4.
5.
6.
7.
The WRITE transaction is completed, the bus goes IDLE and
communication with other SMBus devices may now occur.
The Host drives a START condition, the 7-bit SMBus
address, and a “0” indicating a WRITE.
The Device (Slave) drives the ACK bit (“0”).
The Host drives the 8-bit Register Address.
The Device drives an ACK bit (“0”).
The Host drives the 8-bit data byte.
The Device drives an ACK bit (“0”).
The Host drives a STOP condition.
7
READING A REGISTER
To read a register, the following protocol is used (see SMBus
2.0 specification).
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. The Host drives a STOP condition.
The Host drives a START condition, the 7-bit SMBus
address, and a “0” indicating a WRITE.
The Device (Slave) drives the ACK bit (“0”).
The Host drives the 8-bit Register Address.
The Device drives an ACK bit (“0”).
The Host drives a START condition.
The Host drives the 7-bit SMBus Address, and a “1”
indicating a READ.
The Device drives an ACK bit “0”.
The Device drives the 8-bit data value (register contents).
The Host drives a NACK bit “1”indicating end of the
READ transfer.
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