S1F87110B0A Epson Electronics America, Inc., S1F87110B0A Datasheet - Page 11

• Manufacturer Part Number: S1F87110B0A
• Description: Led Controller
• Manufacturer: Epson Electronics America, Inc.

7. OPERATIONAL AND FUNCTIONAL DESCRIPTION
7.3 Operation Description
SCONST and SAUTO.
1
2
3
8
The S1F87110 operates with the following 3 modes depending on the register settings for activating
Allocation of all registers is provided in Section 7.7.
The device enters the standby mode with SCONST=“0” & SAUTO=“0”.
This stops all the circuit operation.
This IC is in the standby mode when the device is in reset conditions immediately after powered on and
immediately after clearing reset, as all the registers are initialized.
The device enters the fixed brightness mode when the register is set to SCONST=“1”.
The PWM signal is output with the duty ratio that has been set to the fix duty set register, regardless of
brightness evaluation results.
The device enters the automatic luminance control mode when the register SCONST is set to “0”, and
SAUTO to “1”.
The output PWM signal duty is changed linearly according to the brightness evaluation.
Standby mode
Automatic luminance control mode
Fixed brightness mode
address 00H (D2)
0 (Default value)
SCONST
1
0
(activation register)
I
2
C register
address 00H (D1)
0 (Default value)
SAUTO
EPSON
X
1
S1F87110B0A Series Technical Manual (Rev.1.0)
The system enters to the standby state,
with the minimum power consumption.
Fixed duty cycle PWM signal is output
according to the register setting.
Variable cycle PWM signal is output
according to the brightness evaluation.
mode
Standby mode
Fixed brightness mode
Automatic luminance control
Operation Mode