MAX458 Maxim, MAX458 Datasheet - Page 12

• Manufacturer Part Number: MAX458
• Description: 8x4 Video Crosspoint Switches with Buffers
• Manufacturer: Maxim

8x4 Video Crosspoint Switches with Buffers
Figure 6. Serial-Mode Timing
Figure 7. Serial-Mode Data Sequence
Figure 8. Serial Connection (only logic pins shown)
12
DOUT
SCLK
DOUT
SCLK
DIN
Pin numbers apply to DIP package.
DIN
CS
CS
______________________________________________________________________________________
DATA FROM PREVIOUS WRITE CYCLE
DATA OUT
DATA IN
SERIAL
SERIAL
D3
D3
t
CS0
DATA FROM PREVIOUS WRITE CYCLE
19
20
1
D2
D2
DOUT
DIN
SHDN
OUT3
t
t
CSS
DS
D1
D1
MAX458
MAX459
D3 (OUT3)
D3
D0
D0
D0
UPDATE
t
CH
SCLK
t
WR
DH
CS
CE
A0
A1
D0
D1
D2
D3
D3
D3
40
39
38
37
36
26
25
24
23
22
21
CHIP SELECT
D2
t
D2
D0
OUT2
t
CL
SERIAL
CLOCK
V
V
V
CC
CC
CC
D1
D1
D2 (OUT3)
D2
D0
D0
• • •
• • •
• • •
• • •
D3
D3
Figure 9. Microwire Connection
D1 (OUT0)
D1
D2
D2
OUT1
THE DOUT-SI CONNECTION IS NOT REQUIRED FOR
WRITING TO THE MAX458/MAX459, BUT MAY BE USED
FOR DATA-ECHO PURPOSES.
D1
D1
MAX458
MAX459
D0 (OUT0)
D0
D0
D0
DOUT
SCLK
DIN
CS
t
CSH
D3
D3
D2
D2
OUT0
SK
SO
I/O
SI
D1
D1
MICROWIRE
t
CS1
PORT
D3
t
CSW
D0
D0
D3