BD9267KUT ROHM [Rohm], BD9267KUT Datasheet - Page 21

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

BD9267KUT
● ERROR control
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
There are the following four types of ERROR detection signals:
(1) LED OPEN, (2) LED SHORT, (3) REGISTER SHORT, and (4) MOS SHORT
The following section shows timing charts with the setting below:
(Example) DLY01 ［ 11 ： 0 ］＝ 005 ｈ
B
A
① ～③
拡大図
pwm_mskcnt［5：0］
拡大図
DTY01 ［ 11 ： 0 ］＝ 2FD ｈ
PMWMSK ［ 1 ： 0 ］＝ 0 ｈ (PMW mask count value: 02 ｈ )
ERRMSK ［ 1 ： 0 ］＝ 0 ｈ (ERR MASK count value: 02 ｈ )
SSMSK ［ 7 ： 0 ］＝ 01 ｈ
pwm_mskcnt［5：0］
Enlarged chart
pwm_mskcnt［5：0］
*LED _OP_DET _01
err_mskcnt［5：0］
Enlarged chart
err_mskcnt［5：0］
LED_OP_DET_01
LED_OP_DET_01
err_mskcnt［5：0］
PWM_OUT_01
PWM_OUT_01
PWM_OUT_01
HSYNC4I
HSYNC4I
ERROR
HSYNC 4I
SSEND
VSYNC
SSEND
ERROR
HSYNC
VSYNC
HSYNC
ERROR
HSYNC
VSYNC
SSEND
* ②、③も同様
3 F
3F
Note: Apply the same chart for signals (2) and (3).
Figure 19-1. Timing Chart for Error detection 1
A
C
3 F
ERROR signal detected
Error detected
3F
J
ERROR検出
D
E
21/28
Error undetected
ERROR未検出
0
ERROR signal is not detected
0
1
2
1
F
G
2
3
0
3F
K
3
3 F
4
0
1
4
5
2
I
H
5
6
3
TSZ02201-0F1F0C100050-1-2
6
7
4
3 F
3F
7
8
5
03.Aug.2012 Rev.001
8
6
9
B
9
0A
7
00
Datasheet
0A
0B
8
0B