Rainbow Electronics W90N740 - Manual (Page 56)

W90N740
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tRAS [2:0] ：SDRAM bank 0/1, Row active time (see Fig 7.3.4)
tRAS [2:0] MCLK
0 0 0 1
0 0 1 2
0 1 0 3
0 1 1 4
1 0 0 5
1 0 1 6
1 1 0 7
1 1 1 8
Fig 7.3.5 Access timing 2 of SDRAM