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LP5521 Datenblatt(PDF) 22 Page - Texas Instruments

Teilenummer LP5521
Bauteilbeschribung  LP5521 Three-Channel RGB, White-LED Driver With Internal Program Memory and Integrated Charge Pump
PDF  51 Pages
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Hersteller  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
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LP5521 Datenblatt(HTML) 22 Page - Texas Instruments

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ack from slave
start
MSB Chip id LSB
SCL
ack from slave
w
MSB Register Addr LSB
rs
r
MSB
Data
LSB
stop
ack from slave
nack from master
repeated start
data from slave
SDA
start
id = 011 0010b
w ack
address = 00H
ack
rs
r ack
address 00H data
nack
stop
MSB Chip Address LSB
id = 011 0010b
start
MSB Chip id LSB
w
ack
MSB Register Addr LSB
ack
MSB
Data
LSB
ack
stop
ack from slave
ack from slave
ack from slave
SCL
SDA
start
id = 011 0010b
w
ack
address = 02H
ack
ack
address 02H data
stop
22
LP5521
SNVS441I – JANUARY 2007 – REVISED NOVEMBER 2016
www.ti.com
Product Folder Links: LP5521
Submit Documentation Feedback
Copyright © 2007–2016, Texas Instruments Incorporated
<>Data from master [ ] Data from slave
Figure 23. Register Write Format
When a READ function is to be accomplished, a WRITE function must precede the READ function, as shown in
Figure 24.
w = write (SDA = 0)
r = read (SDA = 1)
ack = acknowledge (SDA pulled down by either master or slave
rs = repeated start
id = 7-bit chip address
Figure 24. Register Read Format
7.5.2 LED Controller Operation Modes
Operation modes are defined in register address 01H. Each output channel (R, G, B) operation mode can be
configured separately. MODE registers are synchronized to a 32-kHz clock. Delay between consecutive I2C
writes to OP_MODE register (01H) need to be longer than 153 µs (typical).
Table 10. OP_MODE Register (01H):
NAME
BIT
DESCRIPTION
R_MODE
5:4
R channel operation mode
00b = Disabled, reset R channel PC
01b = Load program to SRAM, reset R channel PC
10b = Run program defined by R_EXEC
11b = Direct control, reset R channel PC
G_MODE
3:2
G channel operation mode
00b = Disabled, reset G channel PC
01b = Load program to SRAM, reset G channel PC
10b = Run program defined by G_EXEC
11b = Direct control, reset G channel PC
B_MODE
1:0
B channel operation mode
00b = Disabled, reset B channel PC
01b = Load program to SRAM, reset B channel PC
10b = Run program defined by B_EXEC
11b = Direct control, reset B channel PC



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