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TT6298 Datasheet(PDF) 8 Page - Tontek Design Technology |
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TT6298 Datasheet(HTML) 8 Page - Tontek Design Technology |
8 / 19 page TT6297/TT6298 07’/06/20 Page 8 of 19 Ver :1.0 FUNCTION EXPLANATION 1. Phrase Selection Phrase Selection Phrases are specified and read into the 2 byte data which consists of I0~ I7 data bus. The phrase selection data is latched when WRB goes high while CSB is low .The format of the phrase specification input is as follows. As shown in the above chart, I7 of the first 1 data byte is always 1. I0~I6 of the first data byte specifies the low phrase address and the I7,I6 of second byte are used as high phrase address. The phrase selection data has a selection of 511 phrases which corresponds to 000000001~111111111. The phrase selection data is used for to A3~A11 address outputs, and they specify both start and stop address which are stored in the external ROM. Relation between Phrase Selection Data and ROM Address Phrase Selection Data Il7 Il6 l6 l5 l4 l3 l2 l1 l0 - - - External ROM address A23~A10 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 Selection Not valid Phrase 1 Phrase 2 Phrase 3 Phrase 510 Phrase 511 0~0 0~0 0~0 0~0 0~0 0~0 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 0 0 1 1 0 0 1 1 1 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 * Phrases can not be specified with all inputs = “0” l7 l6 l5 l4 l3 l2 l1 l0 1st Byte 1 Phrase selection data 2nd Byte Phrase expansion II6,II7 & Channel specification II4,II5 Reduction specification II3~II0 |
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