BD9267KUT ROHM [Rohm], BD9267KUT Datasheet - Page 18

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

BD9267KUT
DTYCNT01L (LED1 PWM duty setting register - Low 8 bits -: Read/Write)
DTYCNT01M (LED1 PWM duty setting register - High 4 bits -: Read/Write)
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TSZ22111・15・001
●ADDR=0Fh
VSYNCREG (VSYNCREG control register: Read/Write)
●ADDR=10h
SSMASKSET (Soft start mask register: Read/Write)
●ADDR=11Ch
●ADDR=12h
This register is used to make mask section setting (in sync with VSYNC) for the startup of power supply.
Decoder
Register
Default
Name
EAMPREFC
Bit
Register
Register
Register
DAC output voltages to analog are converted with the decoders listed above.
Default
Default
Default
Name
Name
Name
Bit
Bit
Bit
If VSYNC is not used, the register can be controlled by turning ON/OFF VSYNCREG instead of VSYNC.
0
0
0
0
1
1
1
1
Note: Reg09h is synchronized with the leading edge of VSYNC signal.
SSMASK[7]
7
DTY01[7]
0.3V: 0.3 / 5 * 4095 = 0F5h
0.4V: 0.4 / 5 * 4095 = 147h
0.5V: 0.5 / 5 * 4095 = 199h
0.6V: 0.6 / 5 * 4095 = 1EBh
0.8V: 0.8 / 5 * 4095 = 28Fh
1.0V: 1.0 / 5 * 4095 = 333h
1.2V: 1.2 / 5 * 4095 = 3F7h
1.5V: 1.5 / 5 * 4095 = 4CCh
0
EAMPREFB
－
－
7
7
0
7
-
-
0
0
1
1
0
0
1
1
SSMASK[6]
VSYNC_REG
DTY01[6]
6
0
１
－
－
6
0
EAMPREFA
-
-
6
0
6
0
1
0
1
0
1
0
1
SSMASK[5]
DTY01[5]
5
0
5
－
－
-
-
5
0
5
VSYNCREG control
EAMP Ref. Voltage Setting
SSMASK[4]
DTY01[4]
18/28
OFF
ON
4
-
-
4
0
－
－
4
4
0
0.3V
0.4V
0.5V
0.6V
0.8V
1.0V
1.2V
1.5V
SSMASK[3]
DTY01[11]
DTY01[3]
3
-
-
3
3
0
0
3
1
EAMP_DAC_11～EAMP_DAC_01
DTY01[10]
DTY01[2]
SSMASK[2]
2
-
-
2
0
2
0
2
1
TSZ02201-0F1F0C100050-1-2
4CCh(1228d)
1EBh(491d)
0F5h(245d)
147h(327d)
199h(409d)
28Fh(655d)
333h(819d)
3F7h(999d)
DTY01[1]
DTY01[9]
SSMASK[1]
1
-
-
1
0
1
0
03.Aug.2012 Rev.001
1
0
VSNC_REG
DTY01[0]
DTY01[8]
SSMASK[0]
0
0
Datasheet
0
0
0
0
0
0