LP39542 Datasheet, PDF (50/58 Pages) National Semiconductor (TI) – Advanced Lighting Management Unit

HC_FLASH (10H) – HIGH CURRENT FLASH DRIVER CONTROL REGISTER
D7
D6
D5
D4
D3
en_safety
hc_pwm
fl_t[1:0]
r-0
rw-0
rw-0
rw-0
rw-0
D2
D1
hc[1:0]
rw-0
rw-0
D0
en_hcflash
rw-0
en_safety
hc_pwm
fl_t[1:0]
hc[1:0]
en_hcflash
Bit 6
Bit 5
Bits 4-3
Bits 2-1
Bit 0
0 - flash timeout feature disabled
1 - flash timeout feature enabled
0 – ext. PWM for high current flash driver disabled
1 – ext. PWM for high current flash driver enabled
Flash duration for high current driver
fl_t[1:0]
Typical flash duration
00
200 ms
01
400 ms
10
600 ms
11
EN_FLASH pin on duration
Current control for high current flash driver
hc[1:0]
current
00
0.25×I_MAX(FLASH)
01
0.50×I_MAX(FLASH)
10
0.75×I_MAX(FLASH)
11
1.00×I_MAX(FLASH)
0 – high current flash driver disabled
1 – high current flash driver enabled
PATTERN_GEN_CTRL (11H) – PATTERN GENERATOR CONTROL REGISTER
D7
D6
D5
D4
D3
D2
en_blink
rgb_start
r-0
r-0
r-0
r-0
rw-0
rw-0
D1
loop
rw-0
D0
log
rw-0
en_blink
rgb_start
loop
log
Bit 3
Bit 2
Bit 1
Bit 0
0 - blinking sequences start bit disabled
1 - blinking sequences start bit enabled
0 – pattern generator disabled
1 – execution pattern starting from command 1
0 – pattern generator loop disabled (single pattern)
1 – pattern generator loop enabled (execute until stopped)
0 – color intensity mode 0
1 – color intensity mode 1
www.national.com
50