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TMS55166 Datasheet(PDF) 23 Page - Texas Instruments

Part # TMS55166
Description  262144 BY 16-BIT MULTIPORT VIDEO RAM
PDF  70 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS55166 Datasheet(HTML) 23 Page - Texas Instruments

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TMS55165, TMS55166, TMS55175, TMS55176
262144 BY 16-BIT MULTIPORT VIDEO RAM
SMVS463 – DECEMBER 1995
23
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
8-bit block write (continued)
DQ0
4
5
6
7
Color Register
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
DQ8
DQ9
DQ10
DQ11
DQ12
DQ13
DQ14
DQ15
0
1
2
3
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
Lower Byte
Upper Byte
One Row of 0–511
12
3
4
5
6
7
0
8
9
1011 12131415
Figure 13. 8-Column Block Write With Masks
Every eight adjacent columns makes a block resulting in 64 blocks along one row. Block 0 comprises columns
0 – 7, block 1 comprises columns 8 – 15, block 2 comprises columns 16 – 23, etc., as shown in Figure 14.
0
1
2
3
456
7
504
505
506
507 508
509
510
511
. . . . . . . . . . . . .
Columns
One Row of 0 – 511
Block 0
Block 63
Figure 14. 8-Column-Block Column-Organization
During 8-column block-write cycles, only the six most significant column addresses (A3 – A8) are latched on the
falling edge of CAS to decode one of the 64 blocks. Address bits A0 – A2 are ignored. Both bytes have the same
block selected.



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