bd9202efs ROHM Co. Ltd., bd9202efs Datasheet - Page 8

• Manufacturer Part Number: bd9202efs
• Description: White Backlight Led Drivers For Medium To Large Lcd Panels Swreg Type
• Manufacturer: ROHM Co. Ltd.

Addres
0CH
0DH
Register map
00H
01H
02H
03H
04H
05H
06H
07H
08Ｈ
09H
0AH
0BH
0EH
0FH
10H
●ADDR=00h
PWMCNT(PWM Control register : Read/Write)
When it makes PWMRST = ' 1 ', PWM Logic and all registers (the PWMRST register is excluded) is reset.
To make normal operation, it is necessary to reset if make PWMRST= ' 0 '.
When it makes PARADRV= ' 1 ', because LED1 and LED2 (LED3 and LED4, LED5 andLED6, LED7 and LED8) operate
synchronously (following the setting of LED of odd number turn), when you use the output of LED1 and LED2 (LED3and LED4,
LED5 and LED6, LED7 and LED8) by short-circuiting, it operates as each heavy-current driver of ILEDMAX=300mA.
11H
© 2009 ROHM Co., Ltd. All rights reserved.
BD9202EFS
www.rohm.com
s
Initial value
Register
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
name
Bit
value
All registers are reset by each condition below.
①UVLO(VREG)＜2.9V(typ.)
②UVLO(EXT)＜1.9V(typ.)
③Thermal shutdown detection (Tj＞175℃)
④Register PWMRST=1( exclude PWMRST itself)
Initial
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
00h
SETPWM1
PWMCNT
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
SETPWM
Register
LEDEN
PWMRST
name
12
21
22
31
32
41
42
51
52
61
62
71
72
81
82
1
7
0
T
PWMRS
LED8EN LED7EN
PWM
LED1[7]
-
PWM
LED2[7]
-
PWM
LED3[7]
-
PWM
LED4[7]
-
PWM
LED5[7]
-
PWM
LED6[7]
-
PWM
LED7[7]
-
PWM
LED8[7]
-
Bit7
not_used
PWMRST
PARADRV
PWMEN
-
PWM
LED1[6]
-
PWM
LED2[6]
-
PWM
LED3[6]
-
PWM
LED4[6]
-
PWM
LED5[6]
-
PWM
LED6[6]
-
PWM
LED7[6]
-
PWM
LED8[6]
-
6
0
0
1
0
1
0
1
Bit6
-
LED6EN
PWM
LED1[5]
-
PWM
LED2[5]
-
PWM
LED3[5]
-
PWM
LED4[5]
-
PWM
LED5[5]
-
PWM
LED6[5]
-
PWM
LED7[5]
-
PWM
LED8[5]
-
not_used
To control LED1and 2, LED3 and 4, LED5 and 6, LED7
Bit5
5
0
To control LED1-LED8 independently
-
LED5EN
PWM
LED1[4]
-
PWM
LED2[4]
-
PWM
LED3[4]
-
PWM
LED4[4]
-
PWM
LED5[4]
-
PWM
LED6[4]
-
PWM
LED7[4]
-
PWM
LED8[4]
-
Bit4
not_used
Normal Function (Default)
PWM logic reset control
8/19
and 8 simultaneously
PWM mode enable
4
0
PWM mode control
LED output control
disable (Default)
-
LED4EN
PWM
LED1[3]
-
PWM
LED2[3]
-
PWM
LED3[3]
-
PWM
LED4[3]
-
PWM
LED5[3]
-
PWM
LED6[3]
-
PWM
LED7[3]
-
PWM
LED8[3]
-
Bit3
Logic reset
not_used
-
LED3EN
PWM
LED1[2]
-
PWM
LED2[2]
-
PWM
LED3[2]
-
PWM
LED4[2]
-
PWM
LED5[2]
-
PWM
LED6[2]
-
PWM
LED7[2]
-
PWM
LED8[2]
-
3
0
Bit2
PARADRV
LED2EN
PWM
LED1[1]
PWM
LED1[9]
PWM
LED2[1]
PWM
LED2[9]
PWM
LED3[1]
PWM
LED3[9]
PWM
LED4[1]
PWM
LED4[9]
PWM
LED5[1]
PWM
LED5[9]
PWM
LED6[1]
PWM
LED6[9]
PWM
LED7[1]
PWM
LED7[9]
PWM
LED8[1]
PWM
LED8[9]
not_used
Bit1
2
0
PWMEN
LED1EN
PWM
LED1[0]
PWM
LED1[8]
PWM
LED2[0]
PWM
LED2[8]
PWM
LED3[0]
PWM
LED3[8]
PWM
LED4[0]
PWM
LED4[8]
PWM
LED5[0]
PWM
LED5[8]
PWM
LED6[0]
PWM
LED6[8]
PWM
LED7[0]
PWM
LED7[8]
PWM
LED8[0]
PWM
LED8[8]
Bitφ
PARADRV
1
0
Register 1 for setting LED7 PWM
(Subordinate bit setting)
Register 2 for setting LED7 PWM
(Superior bit setting)
Register 1 for setting LED8 PWM
(Subordinate bit setting)
PWM
LED ON/OFF Control register
Register 1 for setting LED1 PWM
( Subordinate bit setting)
Register 2 for setting LED1 PWM
(Superior bit setting)
Register 1 for setting LED2 PWM
(Subordinate bit setting)
Register 2 for setting LED2 PWM
(Superior bit setting)
Register 1 for setting LED3 PWM
(Subordinate bit setting)
Register 2 for setting LED3 PWM
(Superior bit setting)
Register 1 for setting LED4 PWM
(Subordinate bit setting)
Register 2 for setting LED4 PWM
(Superior bit setting)
Register 1 for setting LED5 PWM
(Subordinate bit setting)
Register 2 for setting LED5 PWM
(Superior bit setting)
Register 1 for setting LED6 PWM
(Subordinate bit setting)
Register 2 for setting LED6 PWM
(Superior bit setting)
Register 2 for setting LED8 PWM
(Superior bit setting)
Technical Note
2009.04 - Rev.A
control register
Function
PWMEN
0
0