BD9202EFS View Datasheet(PDF) - ROHM Semiconductor
Part Name
Description
Manufacturer
BD9202EFS Datasheet PDF : 20 Pages
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BD9202EFS
Technical Note
●ADDR=01h
LEDEN(LED ON/OFF Control register : Read/Write)
Bit
7
6
5
Register
name
LED8EN
LED7EN
LED6EN
Initial value
0
0
0
4
LED5EN
0
3
LED4EN
0
2
LED3EN
0
1
LED2EN
0
0
LED1EN
0
LED1(～8)EN
0
1
LED1 (～8) output control
OFF (Default)
Usual ON
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 （Subordinate bit setting）: Read/Write)
Bit
7
6
5
4
3
Register PWMLED1 PWMLED PWMLED1 PWMLED1 PWMLED1
name
[7]
1[6]
[5]
[4]
[3]
Initial value
0
0
0
0
0
2
PWMLED1
[2]
0
1
PWMLED1
[1]
0
0
PWMLED1
[0]
0
●ADDR=03h
SETPWM12((Register 2 for setting LED1 PWM (superior bit setting) : Read/Write)
Bit
7
6
5
4
3
Register
name
not used
not used
not used
not used
not used
Initial value
0
0
0
0
0
2
not used
0
1
PWMLED1
[9]
0
0
PWMLED1
[8]
0
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 Superior position 2bit with ADDR=03h. (Chart below)
PWMLED1
[9:0]
“0000000000”
“0000000001”
“0000000010”
“0000000011”
～
“1111111100”
“1111111101”
“1111111110”
“1111111111”
LED1 Pulse width
Usual ‘L’ (Default)
PWMCLK 1 Clock width
PWMCLK 2 Clock width
PWMCLK 3 Clock width
～
PWMCLK 1020 Clock width
PWMCLK 1021 Clock width
PWMCLK 1022 Clock width
PWMCLK 1023 Clock width
●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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© 2009 ROHM Co., Ltd. All rights reserved.
9/19
2009.04 - Rev.A
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