Rainbow Electronics MAX6959 - Manual (Page 13)

MAX6958/MAX6959
2-Wire Interfaced, 3V to 5.5V, 4-Digit,
9-Segment LED Display Drivers with Keyscan
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DUTY CYCLE
TYPICAL SEGMENT
CURRENT (mA)
ADDRESS
CODE (HEX)
D7 D6 D5 D4 D3 D2 D1 D0 HEX CODE
1/64 (min on) 0.36 0x02 X X 0 0 0 0 0 0 0x00
2/64 0.72 0x02 X X 0 0 0 0 0 1 0x01
3/64 1.08 0x02 X X 0 0 0 0 1 0 0x02
4/64 1.44 0x02 X X 0 0 0 0 1 1 0x03
5/64 1.80 0x02 X X 0 0 0 1 0 0 0x04
6/64 2.16 0x02 X X 0 0 0 1 0 1 0x05
— — 0x02 X X — — — — — — —
60/64 21.56 0x02 X X 1 1 1 0 1 1 0x3B
61/64 21.92 0x02 X X 1 1 1 1 0 0 0x3C
62/64 22.28 0x02 X X 1 1 1 1 0 1 0x3D
63/64 22.64 0x02 X X 1 1 1 1 1 0 0x3E
63/64 (max on) 22.64 0x02 X X 1 1 1 1 1 1 0x3F
Table 15. Global Intensity Register Format
1/64th
(MIN ON)
2/64th
3/64th
63/64th
61/64th
62/16th
63/64th
DIGIT 0 CATHODE
DRIVER INTENSITY
SETTINGS
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
HIGH-Z
LOW
LOW
LOW
LOW
LOW
LOW
LOW
MINIMUM 5 µs INTERDIGIT BLANKING INTERVAL
(MAX ON)
ANODE (LIT) CURRENT SOURCE ENABLED
HIGH-Z
ANODE (UNLIT)
HIGH-Z
HIGH-Z
HIGH-Z
DIGIT 1 DIGIT 2 DIGIT 3 DIGIT 0 DIGIT 0
START OF
NEXT CYCLE
ONE COMPLETE 1.28ms MULTIPLEX CYCLE AROUND 4 DIGITS
DIGIT 0's 320 µs MULTIPLEX TIMESLOT
Figure 11. Multiplex Timing Diagram