MAX6954ATL(2014) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX6954ATL
(Rev.:2014)

4-Wire Interfaced, 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan

Maxim Integrated 

MAX6954

4-Wire Interfaced, 2.7V to 5.5V LED Display

Driver with I/O Expander and Key Scan

Table 2. Connection Scheme for Eight 16-Segment Digits

DIGIT O0 O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11 O12 O13 O14 O15 O16 O17 O18

0 CCO — a1 a2 b c d1 d2 e f g1 g2 h

i

j

k

l m dp

1

— CC1 a1 a2 b c d1 d2 e f g1 g2 h

i

j

k

l m dp

2

a1 a2 CC2 — b c d1 d2 e f g1 g2 h

i

j

k

l m dp

3

a1 a2 — CC3 b c d1 d2 e f g1 g2 h

i

j

k

l m dp

4

a1 a2 b c CC4 — d1 d2 e f g1 g2 h

i

j

k

l m dp

5

a1 a2 b c — CC5 d1 d2 e f g1 g2 h

i

j

k

l m dp

6

a1 a2 b c d1 d2 CC6 — e f g1 g2 h

i

j

k

l m dp

7

a1 a2 b c d1 d2 — CC7 e f g1 g2 h

i

j

k

l m dp

Table 3. Connection Scheme for Eight 14-Segment Digits

DIGIT O0 O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11 O12 O13 O14 O15 O16 O17 O18

0 CCO — a — b c d — e f g1 g2 h

i

j

k

l m dp

1

— CC1 a — b c d — e f g1 g2 h

i

j

k

l m dp

2

a — CC2 — b

c

d—e

f g1 g2 h

i

j

k

l

m dp

3

a — — CC3 b

c

d—e

f g1 g2 h

i

j

k

l

m dp

4

a —b

c CC4 — d — e

f g1 g2 h

i

j

k

l

m dp

5

a —b

c — CC5 d — e

f g1 g2 h

i

j

k

l

m dp

6

a —b

c

d — CC6 — e

f g1 g2 h

i

j

k

l

m dp

7

a —b

c

d — — CC7 e

f g1 g2 h

i

j

k

l

m dp

Table 4. Connection Scheme for Sixteen 7-Segment Digits

DIGIT* O0 O1 O2 O3 O4 O5 O6 O7 O8 O9 O10 O11 O12 O13 O14 O15 O16 O17 O18

0, 0a CC0 — 1a — 1b 1c 1d 1dp 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

1, 1a — CC1 1a — 1b 1c 1d 1dp 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

2, 2a 1a — CC2 — 1b 1c 1d 1dp 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

3, 3a 1a — — CC3 1b 1c 1d 1dp 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

4, 4a 1a — 1b 1c CC4 — 1d 1dp 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

5, 5a 1a — 1b 1c — CC5 1d 1dp 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

6, 6a 1a — 1b 1c 1d 1dp CC6 — 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

7, 7a 1a — 1b 1c 1d 1dp — CC7 1e 1f 1g 2a 2b 2c 2d 2e 2f 2g 2dp

*Each cathode driver output (CC0-CC7) connects to two digit common cathode pins.

Table 5. Serial-Data Format (16 Bits)

D15

D14

D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

R/W

ADDRESS

MSB

DATA

LSB

Reading Device Registers

Any register data within the MAX6954 may be read by

sending a logic-high to bit D15. The sequence is:

1) Take CLK low.

2) Take CS low. This enables the internal 16-bit shift

register.

3) Clock 16 bits of data into DIN, D15 first to D0 last.

D15 is high, indicating a read command and bits

D14 through D8 contain the address of the register

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