MAX4571-MAX4574 Maxim, MAX4571-MAX4574 Datasheet - Page 14

• Manufacturer Part Number: MAX4571-MAX4574
• Description: Serially Controlled / Clickless Audio/Video Switches
• Manufacturer: Maxim

isters by connecting DOUT of the first device to DIN of
the second, etc. Connect the CS pins of all devices
together. Data are shifted through the MAX4573/
MAX4574s in series. When CS is brought high, all
devices are updated simultaneously. If any of the
devices in the chain are to be left unchanged, use a
NO_OP command for that device, as shown in Table 1.
Serially Controlled, Clickless
Audio/Video Switches
Figure 5. 3-Wire Serial-Interface Timing Diagram
Figure 6. A Complete 3-Wire Serial-Interface Transmission
14
DOUT
SCLK
DIN
CS
______________________________________________________________________________________
DOUT
SCLK
DIN
CS
D15 D14 D13....
Q15........
1
MSB FROM
PREVIOUS WRITE
MSB
20%
t
CSS
t
DS
D15
t
DH
20%
20%
t
CL
D14
20% 20%
8
t
CH
9
An alternate way of connecting multiple devices is to
decode the CS line. In this case the DOUT pin is not
used and the DIN pins of all devices are connected
together. Address decode logic individually controls the
CS line of each device. When a device is to be selected
its CS line is brought low, data are shifted in, and its CS
is then brought high to execute the command.
70%
D1
D2
70%
t
DO
D1
16
D0....
D0
LSB
.........00
20%
t
CSH
20%
LSB FROM
PREVIOUS WRITE
COMMAND
EXECUTED
t
CSW
70%
70%
t
CSO