BD9267KUT ROHM [Rohm], BD9267KUT Datasheet - Page 15

• Manufacturer Part Number: BD9267KUT
• Description: White LED Diver for Backlight of Medium/Large-sized LCDs
• Manufacturer: ROHM [Rohm]

Address
BD9267KUT
LEDREFA (Analog light modulation setting register - Low 8 bits -: Read/Write)
LED_REF_01 to LED_REF_16 signals to analog are used with the maximum voltage of 1.0V and the minimum voltage of 0.1V,
they are converted with the decoder listed above.
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TSZ22111・15・001
4Bh
4Ch
4Dh
4Eh
4Fh
50h
◆ ◆ ◆ ◆ Register map （ （ （ （ 3/3） ） ） ）
◆ ◆ ◆ ◆ Description of registers
●ADDR=00h
LEDENA (Ch1 to Ch8 LED Enable control register: Read/Write)
●ADDR=01h
LEDENB (Ch9 to Ch16 LED enable control register: Read/Write)
●ADDR=02h
●ADDR=03h
LEDREFB (Analog light modulation setting register - High 4 bits -: Read/Write)
Register Name
Register Name
Register Name
Default
Default
Register Name
Bit
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit
Default
LEDEN
LEDREF[11：0] (Register output)
000h～0CDh
0CEh～7FFh
800h～FFFh
Default
Bit
0
1
Bit
Default
00h
00h
00h
00h
00h
00h
Enable control
Note: Reg02h and 03h are synchronized with the leading edge of VSYNC input signal.
LEDREF[7]
Register Name
DLYCNT14M
DLYCNT15M
DLYCNT16M
DLYCNT14L
DLYCNT15L
DLYCNT16L
Minimum value (0.1V):
Maximum value (1.0V):
Default value (0.3V):
Disable
Enable
LEDEN[7]
LEDEN[15]
7
-
-
7
0
7
1
7
1
DLY14[7]
DLY15[7]
DLY16[7]
BIT7
LEDREF[6]
-
-
-
LEDEN[6]
LEDEN[14]
6
-
-
6
1
6
1
DLY14[6]
DLY15[6]
DLY16[6]
6
BIT6
1
-
-
-
LED_REF_12～LED_REF_01（to analog）
0CDh
0CEh～7FFh
800h
LEDREF[5]
DLY14[5]
DLY15[5]
DLY16[5]
BIT5
LEDEN[5]
LEDEN[13]
-
-
-
5
-
-
5
1
0.1 / 2 * 4095 = 0CDh
1 / 2 * 4095 = 800h
0.3 / 2 * 4095 = 266h
5
1
5
1
DLY14[4]
DLY15[4]
DLY16[4]
BIT4
-
-
-
15/28
LEDREF[4]
LEDEN[12]
LEDEN[4]
4
DLY14[11]
DLY15[11]
DLY16[11]
-
-
DLY14[3]
DLY15[3]
DLY16[3]
BIT3
4
0
4
1
4
1
DLY14[10]
DLY15[10]
DLY16[10]
DLY14[2]
DLY15[2]
DLY16[2]
LEDREF[11]
BIT2
LEDREF[3]
LEDEN[11]
LEDEN[3]
3
0
3
0
3
1
3
1
DLY14[1]
DLY14[9]
DLY15[1]
DLY15[9]
DLY16[1]
DLY16[9]
BIT1
LEDEN[10]
LEDREF[10]
LEDREF[2]
LEDEN[2]
DLY14[0]
DLY14[8]
DLY15[0]
DLY15[8]
DLY16[0]
DLY16[8]
BIT0
TSZ02201-0F1F0C100050-1-2
2
1
2
1
2
1
2
0
LED14 PWM delay time setting (Low 8bit)
LED14 PWM delay time setting (High 4bit)
LED15 PWM delay time setting (Low 8bit)
LED15 PWM delay time setting (High 4bit)
LED16 PWM delay time setting (Low 8bit)
LED16 PWM delay time setting (High 4bit)
LEDEN[9]
03.Aug.2012 Rev.001
LEDEN[1]
LEDREF[1]
LEDREF[9]
1
1
1
1
1
1
1
1
Description
LEDEN[8]
Datasheet
LEDEN[0]
LEDREF[0]
LEDREF[8]
0
1
0
1
0
0
0
0