LP3952 Datasheet, PDF (33/46 Pages) National Semiconductor (TI) – 6-Channel Color LED Driver with Audio Synchronization

LP3952
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SNVS518A – JULY 2007 – REVISED MARCH 2013
ADDR
(HEX)
5D
5E
5F
60
Table 6. LP3952 Control Register Names and Default Values (continued)
REGISTER
Command
7B
Command
8A
Command
8B
Reset
D7
D6
cet[1:0]
0
0
r[2:0]
0
0
cet[1:0]
0
0
D5
D4
D3
D2
b[2:0]
0
0
0
0
g[2:0]
0
0
0
0
b[2:0]
0
0
0
0
Writing any data to Reset Register resets LP3952
D1
D0
tt[2:0]
0
0
cet[3:2]
0
0
tt[2:0]
0
0
LP3952 Registers
REGISTER BIT EXPLANATIONS
Each register is shown with a key indicating the accessibility of the each individual bit, and the initial condition:
Register Bit Accessibility and Initial Condition
Key
Bit Accessibility
rw
Read/write
r
Read only
–0,–1
Condition after POR
RGB CTRL (00H) – RGB LEDS CONTROL REGISTER
D7
cc_rgb1
rw-1
D6
cc_rgb2
rw-1
D5
r1sw
rw-0
D4
g1sw
rw-0
D3
b1sw
rw-0
D2
r2sw
rw-0
D1
g2sw
rw-0
D0
b2sw
rw-0
cc_rgb1
cc_rgb2
r1sw
g1sw
b1sw
r2sw
g2sw
b2sw
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0 - R1, G1 and B1 are constant current sinks, current limited internally
1 - R1, G1 and B1 are switches, limit current with external ballast resistor
0 – R2, G2 and B2 are constant current sinks, current limited internally
1 – R2, G2 and B2 are switches, limit current with external ballast resistor
0 – R1 disabled
1 – R1 enabled
0 – G1 disabled
1 – G1 enabled
0 – B1 disabled
1 – B1 enabled
0 – R2 disabled
1 – R2 enabled
0 – G2 disabled
1 – G2 enabled
0 – B2 disabled
1 – B2 enabled
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