bd9202efs ROHM Co. Ltd., bd9202efs Datasheet - Page 9

• Manufacturer Part Number: bd9202efs
• Description: White Backlight Led Drivers For Medium To Large Lcd Panels Swreg Type
• Manufacturer: ROHM Co. Ltd.

●ADDR=01h
LEDEN(LED ON/OFF Control register : Read/Write)
When doing PWM modulated light with PWMEN of ADDR=00h, if LED1 of ADDR=01h (8) EN is designated as 1, it becomes
regular ON. (LED1 (8) EN takes precedence.) So after that, if LED1 (8) EN is designated as 0, it returns to the PWM modulated
light that is set at beginning.
●ADDR=02h
SETPWM11(Register 1 for setting LED1 PWM （
●ADDR=03h
It sets Duty of PWM modulated light with the total 10bit of Bit70 of ADDR=02h and Bit1-0 of ADDR=03h.
To set the subordinate position 8bit with ADDR=02h and the
●ADDR=04h～11h
The setting method is similar to LED1 of ADDR=02h,03h is described above with the PWM pulse width setting register of
LED28.
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BD9202EFS
www.rohm.com
SETPWM12((Register 2 for setting LED1 PWM (superior bit setting) : Read/Write)
Initial value
Initial value
Initial value
Register
Register
Register
name
name
name
Bit
Bit
Bit
PWMLED1
LED8EN
not used
[7]
7
0
7
0
7
0
“0000000000”
“0000000010”
LED1(～8)EN
“0000000001”
“0000000011”
“1111111100”
“1111111110”
“1111111101”
PWMLED
“1111111111”
LED7EN
not used
PWMLED1
1[6]
6
0
6
0
6
0
[9:0]
～
0
1
PWMLED1
LED6EN
not used
[5]
Subordinate bit setting
5
0
5
0
5
0
PWMCLK 1020
PWMCLK 1021
PWMCLK 1022
PWMCLK 1023
PWMLED1
LED5EN
not used
PWMCLK 2
PWMCLK 3
PWMCLK 1 Clock width
Superior
LED1 (～8) output control
9/19
[4]
4
0
4
0
4
0
Usual ‘L’ (Default)
LED1 Pulse width
OFF (Default)
）: Read/Write)
position 2bit with ADDR=03h. (Chart below)
Usual ON
PWMLED1
～
LED4EN
not used
Clock width
Clock width
[3]
Clock width
Clock width
Clock width
Clock width
3
0
3
0
3
0
PWMLED1
LED3EN
not used
[2]
2
0
2
0
2
0
PWMLED1
PWMLED1
LED2EN
[1]
[9]
1
0
1
0
1
0
Technical Note
2009.04 - Rev.A
PWMLED1
PWMLED1
LED1EN
[0]
[8]
0
0
0
0
0
0