S1F76680 Epson Electronics America, Inc., S1F76680 Datasheet - Page 21

• Manufacturer Part Number: S1F76680
• Description: Led Driver
• Manufacturer: Epson Electronics America, Inc.

[7] Acquisition of brightness information
Setting of register-based fixed current
environment.
following
NLED = “1.”
7.4 I
driver, whose LED’s current value can change according to the ambient brightness.
advanced setting of the white LED driver.
I
S1F76680 Technical Manual (Rev.1.22)
2
C basic specifications
[Address]
[Pins being used]
[Voltage level]
S1F76680 allows lighting LED forcibly at a fixed current value without resorting to brightness of the
Just like the current setting in the automatic luminescence control, set this fixed current based on the
formula and using 7 bits from D0 (LSB) to D6 (MSB) at address 01H. D7 is the dummy.
Note that setting of SLED (0 to 3) lights off LED.
To drive LED at this imperative fixed current value, set D2 register (register name: NLED) of address 00H to
S1F76680 incorporates a I
By sending specific commands to the I
The basic operation is complied with “I
Register map is shown below:
S1F76680 can read brightness information (brightness 1 to 16) as data.
Read data from address 00H with I
Brightness information will be output as 4-bit information of D7, D6, D5, D4 (register name: X3, X2, X1,
X0) as follows:
Brightness 1 = (D7,D6,D5,D4,D3,D2,D1,D0) = (0,0,0,0,X,X,X,X)
Brightness 2 = (D7,D6,D5,D4,D3,D2,D1,D0) = (0,0,0,1,X,X,X,X)
Brightness 16 (D7,D6,D5,D4,D3,D2,D1,D0) = (1,1,1,1,X,X,X,X)
2
C slave function
ILED(mA)=ILEDmax × SLED / 127
7-bit length
Slave address 1010100X
SCL Clock input pin
SDA Data I/O pin
V
DDL
level
2
C-Bus controller with slave function, to enhance operability of the white LED
2
C, which will be explained later.
2
2
C controller, you can read / write data in a register, and thus, perform
C-BUS SPECIFICATION VERSION2.1” of Philips.
7. OPERATIONAL AND FUNCTIONAL DESCRIPTION
EPSON
17