Configuration 0 (config0) – address 0 – Cirrus Logic CS1631 User Manual
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DS954F3
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6.2 Configuration 0 (Config0)
–
Address 0
6.3 Lockout Key (LOCK0, LOCK1, LOCK2, LOCK3)
–
Address 1 - 4
Lockout Key is a 32-bit long-word used for password protection when accessing the OTP registers. Register
LOCK0 is the least significant byte of the Lockout Key, and register LOCK3 is the most significant byte of
Lockout Key. Register LOCK2 is the byte to the right of LOCK3, and register LOCK1 is the byte to the left of
LOCK0. To access the OTP registers on an IC with a lockout mechanism that has been enabled, see “Cus-
tomer I
6.4 Color Polynomial Coefficient (P30, P20, P10, P03, P02, P01, P21, P12, P11, P00)
–
Address 5 - 24
Color polynomial coefficients used to calculate the gain (GAIN
DTR
) that controls the current in the color LED
channel based on temperature drift and current dim level. The value is a two's complement number in the
range of -8.0
value<8.0, with the binary point to the right of bit 12. The gain polynomial is:
where,
T = the measured normalized temperature and is 0
T<1.0
D = the normalized dim value and is 0
D<1.0
GAIN
DTR
= gain of the channel based on the temperature measurement and the dim value. The polynomial
coefficients should be selected such that the computed GAIN
DTR
is always a positive number in the range
of 0 DTR <4. Color Polynomial Coefficients, Pxx, are 16 bits in length where Pxx-MSB is the most significant byte and 7 6 5 4 3 2 1 0 - - - - - - MODE LOCKOUT Number Name Description [7:2] - Reserved [1] MODE Appends two of the color system coefficients (P01 followed by P10) to the 32- 0 = 32-bit key [0] LOCKOUT Configures the IC lockout security mechanism by using Lockout Key. 0 = Disable MSB 30 29 28 27 26 25 24 ..... 6 5 4 3 2 1 LSB 2 31 2 30 2 29 2 28 2 27 2 26 2 25 2 24 ..... 2 6 2 5 2 4 2 3 2 2 2 1 2 0 MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB -(2 3 ) 2 2 2 1 2 0 2 -1 2 -2 2 -3 2 -4 2 -5 2 -6 2 -7 2 -8 2 -9 2 -10 2 -11 2 -12 GAINDTR P30 T 3 P20 T 2 P10 + + T P03 D 3 P02 + + D 2 P01 D P21 T 2 D + + = P12 T D 2 P11 T D P00 + + +
Pxx-LSB is the least significant byte.
bit lockout key to make it a 64-bit key from a 32-bit key to increase security.
1 = 64-bit key
1 = Enable