ds3881et-r-c Maxim Integrated Products, Inc., ds3881et-r-c Datasheet - Page 22

• Manufacturer Part Number: ds3881et-r-c
• Description: Ds3881 Single-channel, Automotive Ccfl Controller
• Manufacturer: Maxim Integrated Products, Inc.

Table 7. EMI Control Register (EMIC) [Shadowed-EEPROM, F6h]
Single-Channel Automotive CCFL Controller
22
BIT
0
1
2
3
4
5
6
7
____________________________________________________________________
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
⎯
FACTORY
DEFAULT
⎯
0
0
0
0
0
0
0
STEPE
NAME
RSVD
SSM
SS0
SS1
FS0
FS1
FS2
Lamp Oscillator Spread-Spectrum Modulation Select
0 = Triangular modulation.
1 = Pseudorandom modulation.
Reserved. This bit should be set to zero.
Lamp Frequency Step Enable. Logically ORed with the step invoked.
0 = Lamp operates at nominal frequency.
1 = Frequency step invoked.
FS2
0
0
0
0
1
1
1
1
SS1
0
0
1
1
LAMP OSCILLATOR SPREAD-SPECTRUM MODULATION SELECT
FS1
0
0
1
1
0
0
1
1
LAMP OSCILLATOR FREQUENCY STEP SELECT
SS0
0
1
0
1
FS0
0
1
0
1
0
1
0
1
(SS0 = 0 AND SS1= 0)
FREQUENCY STEP
SELECTED LAMP
Step Down 1%
Step Down 2%
Step Down 3%
Step Down 4%
FUNCTION
SELECTED LAMP FREQUENCY SPREAD
Step Up 1%
Step Up 2%
Step Up 3%
Step Up 4%
SPREAD-SPECTRUM DISABLED
±1.5%
±3.0%
±6.0%
Lamp Frequency x4
Lamp Frequency x2
Lamp Frequency x1
Lamp Frequency x1/2
Lamp Frequency x1/4
Lamp Frequency x1/8
Lamp Frequency x1/16
Lamp Frequency x1/32
(SS0 AND/OR SS1 = 1)
SPREAD-SPECTRUM
MODULATION RATE