BD9267KUT ROHM [Rohm], BD9267KUT Datasheet - Page 22

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

pwm_mskcnt［5：0］
err_mskcnt［5：0］
BD9267KUT
pwm_mskcnt［5：0］
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
RES_SH_DET_01
err_mskcnt［5：0］
pwm_mskcnt［5：0］
RES_SH_DET_01
M
err_mskcnt［5：0］
RES_SH_DET_01
PWM_OUT_01
④
PWM_OUT_01
L
[Operation ］
The pwm_mskcnt counter starts counting from the falling edge of HSYNC4I next to the signal that set LED_OP_01 to
“H”. When the counter reaches the set count (02h), the err_maskcnt counter will start counting. When the counter
reaches the set count (02h), the ERROR output signal will be set to “H”.
Subsequently, the error state is continually monitored at the leading edge of pwm_out_01 and judged as “Error not
detected”. After that, when the pwm_mskcnt counter reaches the set count value, the ERROR output signal will be
set to “L”.
The count numbers of pwm_mskcnt and err_mskcnt for the detection signal (4) are the same as those for the
detection signals (1) to (3).
PWM_OUT_01
拡大図
HSYNC4I
Enlarged chart
拡大図
HSYNC
VSYNC
HSYNC4I
ERROR
Enlarged chart
SSEND
HSYNC4I
HSYNC
ERROR
VSYNC
SSEND
HSYNC
VSYNC
SSEND
ERROR
3F
3F
Figure 19-2. Timing Chart for Error detection 2
L
3F
3F
00
01
00
02
01
22/28
03
00
02
3F
3F
04
01
03
00
05
02
04
06
03
05
07
04
3F
3F
06
08
05
07
TSZ02201-0F1F0C100050-1-2
06
09
08
07
0A
03.Aug.2012 Rev.001
09
M
08
0B
3F
00
0A
09
0C
0B
Datasheet
0A
0D
0C
0B
0E
0D