MAX6960 MAXIM [Maxim Integrated Products], MAX6960 Datasheet - Page 14

• Manufacturer Part Number: MAX6960
• Description: 4-Wire Serially Interfaced 8 x 8 Matrix Graphic LED Drivers
• Manufacturer: MAXIM [Maxim Integrated Products]

4-Wire Serially Interfaced
8 x 8 Matrix Graphic LED Drivers
Figure 9. 16-Bit Read from the MAX6960–MAX6963
Figure 10. 24-Bit Read from the MAX6960–MAX6963
4) Take CS high (while CLK is still high after clocking
5) Take CLK low.
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:
14
DOUT
CLK
DIN
CS
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.
in the last data bit).
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
______________________________________________________________________________________
TRI-STATE
DOUT
D23
= 1
CLK
DIN
CS
D22
TRI-STATE
D21
D15
= 1
D20
D14
D19
D13
D18
Reading Device Registers
D17
D12
D16
D11
D15
D10
D14
D9
D13
D8
D12
D7
D11
D6
D10
D5
D9
D4
D8
4) Take CS high (while CLK is still high after clocking
5) Take CLK low.
6) The selected MAX6960’s DOUT is enabled from tri-
7) Clock 8 bits of data from DOUT, D7 first to D0 last,
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.
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
D3
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.
in the last data bit).
state for read back.
observing the setup and hold times.
D6
D2
D5
D1
Local 3-Wire Serial Interface
D4
D0
D3
D7
D2
D6
D1
D5
D0
D4
D7
D3
D6
D2
D5
D4
D1
D3
D0
D2
D1
.
D0
.