RT6908
Application Information
I2C Command
Slave Address
7
1
6
1
5
0
4
1
3
0
2
0
1
0 = LSB
R/W
A0
Single I2C Register Write Protocol
Slave
Slave
Slave
D7 D6 D5 D4 D3 D2 D1 D0
1
1
0
1
0
0
A0
0
Register Address
Register Address
Stop
Stop
ACK
ACK
ACK
Slave Address
Single I2C Register Read Protocol
Slave
Slave Re-
ACK Start
Slave
ACK
1
1
0
1
0
0
A0
0
1
1
0
1
0
0 A0 1
Stop
ACK
Slave Address
Slave Address
D7 D6 D5 D4 D3 D2 D1 D0
Master
NACK
Stop
Multiple I2C Register Write Protocol
Slave
Slave
D7 D6 D5 D4 D3 D2 D1 D0
Slave
ACK
1
1
0
1
0
0
A0
0
Register Address
Stop
ACK
ACK
Slave Address
Slave
Slave
ACK
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Stop
ACK
Multiple I2C Register Read Protocol
Slave
Slave Re-
Slave
ACK
1
1
0
1
0
0
A0
0
Register Address
1
1
0
1
0
0 A0 1
Stop
ACK
ACK Start
Slave Address
Slave Address
D7 D6 D5 D4 D3 D2 D1 D0
Master
Master
NACK
Stop
D7 D6 D5 D4 D3 D2 D1 D0
ACK
Register Map
Address Name
Description
Default Value Resolution
Range
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
AVDD
VGH
VGL
VIO
[5 : 0] Boost
15.6V (1Dh)
35.5V (16h)
−6V (2Ah)
0.1V
0.5V
12.7V to 19V (00h to 3Fh)
24.5V to 40V (00h to 1Fh)
−1.8V to −8.1V (00h to 3Fh)
−7% to 7% (00h to 0Eh)
−7% to 7% (00h to 0Eh)
0 to 15 x DLYR1 (00h to 0Fh)
0 to 15 x DLYR2 (00h to 0Fh)
0 to 15 x DLYR3 (00h to 0Fh)
1ms, 10ms, 200ms
[4 : 0] VGH
[5 : 0] VGL
−0.1V
1%
[3 : 0] VIO adjustment
0% (07h)
V
[3 : 0] V
adjustment
0% (07h)
1%
CORE
CORE
DLY1
DLY2
DLY3
DLYR1
DLYR2
DLYR3
SS
[3 : 0] VGL Delay Time
[3 : 0] AVDD Delay Time
[3 : 0] VGH Delay Time
[1 : 0] DLY1 Resolution
[1 : 0] DLY2 Resolution
[1 : 0] DLY3 Resolution
[3 : 0] AVDD Soft-Start Time
200ms (01h)
400ms (02h)
10ms (01h)
200ms (02h)
200ms (02h)
10ms (01h)
2ms (02h)
DLYR1
DLYR2
DLYR3
1ms, 10ms, 200ms
1ms, 10ms, 200ms
1ms
0ms to 15ms (00h to 0Fh)
[3 : 0] Isolation Switch
Current Limit
[7 : 0] ’’55h’’ Start Power On
Sequence
Disable, 100mV to 800mV
(00h to 0Fh)
0Ch
FFh
ILIMGD
CTRL
Disable (00h)
00h
50mV
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS6908-01 March 2013
www.richtek.com
13
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