DS90CP04_14 Datasheet, PDF (16/25 Pages) Texas Instruments – DS90CP04 1.5 Gbps 4x4 LVDS Crosspoint Switch

DS90CP04
SNLS154I – JANUARY 2002 – REVISED APRIL 2013
DEVICE 0 WRITE PROGRAMMING SEQUENCE
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SCLK
Number
6
18
36
48
60
Event Description
Device 0 (R=0, C=0) detects “WRITE” frame of first Control Word.
Device 0 (R=0, C=0) sees Row = 1, Column = 0 of first Control Word. The Row address of the first Control Word is
decremented by 1 (Row Address = 0) and sent out RSO.
Device 0 (R=0, C=0) detects “WRITE” frame of second Control Word.
Device 0 (R=0, C=0) sees Row = 0, Column = 0 of second Control Word. This is a valid configuration write address, Device
1 prepares to receive configuration information.
Device 0 (R=0, C=0) has received configuration information and is waiting for a LOAD.
DEVICE 1 WRITE PROGRAMMING SEQUENCE
SCLK
Number
13
25
37
43
55
Event Description
Device 1 (R=1, C=0) detects “WRITE” frame of first Control Word.
Device 1 (R=1,C=0) sees Row = 0, Column = 0 of first Control Word. This is a valid configuration write address, Device 1
prepares to receive configuration information.
Device 1 (R=1,C=0) has received configuration information and is waiting for a LOAD.
Device 1 (R=1, C=0) detects “WRITE” frame of second Control Word.
Device 1 (R=1,C=0) sees Row = 3F, Column = 0 of second Control Word. The Row address of the second Control Word is
decremented by 1 (Row Address = 3E) and sent out RSO.
CONFIGURATION READ
30 Bit Control Word: [READ FRAME] [ROW ADDRESS][COLUMN ADDRESS] [OUT1][OUT2][OUT3][OUT4]
ARRAY WRITE
[01 1110] [1][0] [0][0][0][0] //*Array position 1, Return Configuration Information *//
[01 1110] [0][0] [0][0][0][0] //*Array position 0, Return Configuration Information *//
NUMBER OF SCLK POSITIVE EDGE TRANSITIONS
0
30
60
90
120
150
DEVICE 0
CONTROL WORD 1
[01 E] [0][3] [0][0][0][0]
CONTROL WORD 2
[01 E] [0][2] [0][0][0][0]
CONTROL WORD 3
[01 E] [0][1] [0][0][0][0]
CONTROL WORD 4
[01 E] [0][0] [0][0][0][0]
DEVICE 1
(+7 Clocks)
DEVICE 2
(+14 Clocks)
[01 E] [0][2] [0][0][0][0]
[01 E] [0][1] [0][0][0][0] [01 E] [0][0] [0][0][0][0] [01 E] [0][3F] [1][2][3][4]
[01 E] [0][1] [0][0][0][0]
[01 E] [0][0] [0][0][0][0] [01 F] [0][3F] [0][0][2][0] [01 E] [0][3E] [1][2][3][4]
DEVICE 3
(+21 Clocks)
[01 E] [0][0] [0][0][0][0] [01 E] [0][3F] [0][3][0][0] [01 E] [0][3E] [0][0][2][0] [01 E] [0][3D] [1][2][3][4]
Device 3 Configuration Read Out
[01 E] [0][3F] [4][4][4][4]
Device 2 Configuration Read Out
[01 E] [0][3E] [0][3][0][0] _{Device 1 Configuration Read Out}
[01 E] [0][3D] [0][0][2][0]
Device 0 Configuration Read Out
[01 E] [0][3C] [1][2][3][4]
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