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LP5521
www.ti.com
ENABLE REGISTER (ENABLE)
Address 00H
Reset value 00H
Table 20. Enable Register
SNVS441F – JANUARY 2007 – REVISED FEBRUAY 2013
7
LOG_EN
6
CHIP_EN
5
R_EXEC[1]
4
R_EXEC[0]
3
G_EXEC[1]
2
G_EXEC[0]
1
B_EXEC[1]
0
B_EXEC[0]
Name
LOG_EN
Bit
7
Access
R/W
Active
High
Description
Logarithmic PWM adjustment generation enable
Master chip enable. Enables device internal startup sequence. Startup delay
CHIP_EN
6
R/W
High
after setting CHIP_EN is 500 μ s. See Operation for further information.
Setting EN pin low resets the CHIP_EN state to 0.
R channel program execution.
00b = Hold: Wait until current command is finished then stop while EXEC
mode is hold. PC can be read or written only in this mode.
01b = Step: Execute instruction defined by current R channel PC value,
R_EXEC
5:4
R/W
increment PC and change R_EXEC to 00b (Hold)
10b = Run: Start at program counter value defined by current R Channel PC
value
11b = Execute instruction defined by current R channel PC value and change
R_EXEC to 00b (Hold)
G channel program execution
00b = Hold: Wait until current command is finished then stop while EXEC
mode is hold. PC can be read or written only in this mode.
01b = Step: Execute instruction defined by current G channel PC value,
G_EXEC
3:2
R/W
increment PC and change G_EXEC to 00b (Hold)
10b = Run: Start at program counter value defined by current G Channel PC
value
11b = Execute instruction defined by current G channel PC value and
change G_EXEC to 00b (Hold)
B channel program execution
00b = Hold: Wait until current command is finished then stop while EXEC
mode is hold. PC can be read or written only in this mode.
01b = Step: Execute instruction defined by current B channel PC value,
B_EXEC
1:0
R/W
increment PC and change B_EXEC to 00b (Hold)
10b = Run: Start at program counter value defined by current B Channel PC
value
11b = Execute instruction defined by current B channel PC value and change
B_EXEC to 00b (Hold)
EXEC registers are synchronized to 32 kHz clock. Delay between consecutive I 2 C writes to ENABLE register
(00H) need to be longer than 488 μ s (typ).
Copyright ? 2007–2013, Texas Instruments Incorporated
Product Folder Links: LP5521
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