lm8850urx National Semiconductor Corporation, lm8850urx Datasheet - Page 12

• Manufacturer Part Number: lm8850urx
• Description: High-performance, Step-up Dc-dc Converter For High- Power Applications In Mobile Devices
• Manufacturer: National Semiconductor Corporation

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When a READ function is to be accomplished, a WRITE func-
tion must precede the READ function as shown in the Read
Cycle waveform.
HIGH-SPEED, 3.4 MHZ MODE
High-speed mode is entered by:
1.
2.
3.
4.
5.
6.
CONTROL
CONTROL
Start condition;
Chip Address: 0000 1XXXX (X = don't care);
Wait a clock for the acknowledge;
Now everything is in HS mode...do a repeated start (do
NOT do a “stop” then a “start” because a “stop” kicks the
part out of HS mode);
Send read or writes in HS mode. (Remember to use
“repeated starts” between commands.); then
When you are done with the last command send a “stop”
condition to put the part back into regular 400 kHz mode.
Register name
Register Information and Details
Location
0
1
I
2
C Read Cycle
12
I
The device address for LM8850 is 60 (HEX).
2
C-COMPATIBLE CHIP ADDRESS
Type
R/W
R/W
Control Register 1
Control Register 2
Register
30113211