Rainbow-electronics MAX6963 Bedienungsanleitung PDF herunterladen (Seite 14)

MAX6960–MAX6963

4-Wire Serially Interfaced

8 x 8 Matrix Graphic LED Drivers

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observing the setup and hold times. Bit D15 is low,

indicating a write command.

For a 24-bit transmission:

Clock 24 bits of data into DIN, D23 first to D0 last,

observing the setup and hold times. Bit D23 is low,

indicating a write command.

4) Take CS high (while CLK is still high after clocking

in the last data bit).

5) Take CLK low.

Reading Device Registers

Any register data within the MAX6960 may be read by

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

1) Take CLK low.

2) Take CS low.

3) For a 16-bit transmission:

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

observing the setup and hold times. Bit D15 is high,

indicating a read command. Bits D7 to D0 are

dummy bits, and are discarded by the MAX6960.

For a 24-bit transmission: Clock 24 bits of data into

DIN, D23 first to D0 last, observing the setup and

hold times. Bit D23 is high, indicating a read com-

mand. Bits D7 to D0 are dummy bits, and are dis-

carded by the MAX6960.

4) Take CS high (while CLK is still high after clocking

in the last data bit).

5) Take CLK low.

6) The selected MAX6960’s DOUT is enabled from tri-

state for read back.

7) Clock 8 bits of data from DOUT, D7 first to D0 last,

observing the setup and hold times.

8) Take CLK low after the final (8th) data bit.

The selected MAX6960’s DOUT returns to tri-state.

Figure 10 shows a read operation when 24 bits are

transmitted and 8 bits are read back.

Local 3-Wire Serial Interface

The MAX6960 uses a 3-wire interface to bus together

up to 256 MAX6960s. The 3-wire bus enables each

device to calculate its own unique driver address

(0 to 255), and reconfigure its display memory. The

ADDOUT output also provides an interrupt at every

page change, when the plane counter is configured to

automatic (Table 30).

D7 D6 D5 D4 D3 D2 D1

CLK

DIN

DOUT

D15

= 1

TRI-STATE

D14 D13 D12 D11 D10 D9 D8 D0

D7 D6 D5 D4 D3 D2 D1 D0

Figure 9. 16-Bit Read from the MAX6960–MAX6963

D22 D21 D20 D19 D18 D7 D6 D5 D4 D3 D2 D1

CLK

DIN

DOUT

D23

= 1

TRI-STATE

D14 D13 D12 D11 D10 D9 D8D16 D15D17 D0

D7 D6 D5 D4 D3 D2 D1 D0

Figure 10. 24-Bit Read from the MAX6960–MAX6963

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 33 34

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