MAX6967 MAXIM [Maxim Integrated Products], MAX6967 Datasheet - Page 19

• Manufacturer Part Number: MAX6967
• Description: 10-Port Constant-Current LED Drivers and I/O Expanders with PWM Intensity Control
• Manufacturer: MAXIM [Maxim Integrated Products]

The ramp-down register sets the hold-off and fade-off
times and allows hold-off and fade-off to be disabled
(zero delay), if desired (Table 9). The ramp-up register
sets the ramp-up time and allows ramp-up to be dis-
abled (zero delay), if desired (Table 10). The configura-
tion register contains 3 status bits that identify whether
the MAX6966/MAX6967 are in hold-off, fade-off, or ramp-
up condition (Table 4). The configuration register also
enables or disables ramp-up. One write to the configura-
tion register can put the MAX6966/MAX6967 into shut-
down (using hold-off and fade-off settings in the fade
Table 9. Ramp-Down Register Format
Write ramp-down
Read ramp-down
Fade-off time (f
Instant going into shutdown after hold-off delay
1/16s ramp-down from full current before shutdown after
hold-off delay
1/8s ramp-down from full current before shutdown after
hold-off delay
1/4s ramp-down from full current before shutdown after
hold-off delay
1/2s ramp-down from full current before shutdown after
hold-off delay
1s ramp-down from full current before shutdown after
hold-off delay
2s ramp-down from full current before shutdown after
hold-off delay
4s ramp-down from full current before shutdown after
hold-off delay
Hold-off time (f
Zero hold-off delay before fade-off going into shutdown
1/16s hold-off delay before fade-off going into shutdown
1/8s hold-off delay before fade-off going into shutdown
1/4s hold-off delay before fade-off going into shutdown
1/2s hold-off delay before fade-off going into shutdown
1s hold-off delay before fade-off going into shutdown
2s hold-off delay before fade-off going into shutdown
4s hold-off delay before fade-off going into shutdown
10-Port Constant-Current LED Drivers and I/O
PWM
PWM
______________________________________________________________________________________
= 32768Hz)
= 32768Hz)
REGISTER
Expanders with PWM Intensity Control
R/W
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
register) and determine whether CS run is enabled for
restart, and whether ramp-up is to be used for restart.
ADDRESS
CODE
(HEX)
0x11
D7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
D6
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
D5
X
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
REGISTER DATA
Hold-off
D4
X
X
X
X
X
X
X
X
0
0
1
1
0
0
1
1
D3
X
X
X
X
X
X
X
X
0
1
0
1
0
1
0
1
D2
X
X
X
X
X
X
X
X
0
0
0
0
1
1
1
1
Fade-off
D1
0
0
1
1
0
0
1
1
X
X
X
X
X
X
X
X
D0
0
1
0
1
0
1
0
1
X
X
X
X
X
X
X
X
19