Rainbow-electronics MAX6959 Bedienungsanleitung PDF herunterladen (Seite 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

LOW

MINIMUM 5µs INTERDIGIT BLANKING INTERVAL

(MAX ON)

ANODE (LIT)

CURRENT SOURCE ENABLED

HIGH-Z

ANODE (UNLIT)

HIGH-Z

DIGIT 1 DIGIT 2 DIGIT 3DIGIT 0 DIGIT 0

START OF

NEXT CYCLE

ONE COMPLETE 1.28ms MULTIPLEX CYCLE AROUND 4 DIGITS

DIGIT 0's 320µs MULTIPLEX TIMESLOT

Figure 11. Multiplex Timing Diagram

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 19

MAX6958/MAX6959 1

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