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ACS8520 Datasheet(PDF) 44 Page - Semtech Corporation |
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ACS8520 Datasheet(HTML) 44 Page - Semtech Corporation |
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44 / 150 page  ADVANCED COMMUNICATIONS FINAL DATASHEET Revision 3.01/October 2003 © Semtech Corp. Page 44 www.semtech.com ACS8520 SETS Motorola Mode In MOTOROLA mode, the device is configured to interface with a microprocessor using a 680x0 type bus as parallel data + address. Figure 13 and Figure 14 show the timing diagrams of read and write accesses for this mode. Figure 13 Read Access Timing in MOTOROLA Mode Table 21 Read Access Timing in MOTOROLA Mode (for use with Figure 13) Symbol Parameter MIN TYP MAX tsu1 Setup A valid to CSBfalling edge 4 ns - - tsu2 Setup WRB valid to CSBfalling edge 0 ns - - td1 Delay CSBfalling edge to AD valid (consecutive Read - Read) 12 ns - 40 ns Delay CSBfalling edge to AD valid (consecutive Write - Read) 16 ns - 192 ns td2 Delay CSBfalling edge to DTACKrising edge - - 13 ns td3 Delay CSBrising edge to AD high-Z - - 10 ns td4 Delay CSBrising edge to RDY high-Z - - 9 ns tpw1 CSB Low time (consecutive Read - Read) 25 ns 62 ns - CSB Low time (consecutive Write - Read) 25 ns 193 ns - tpw2 RDY High time (consecutive Read - Read) 12 ns - 49 ns RDY High time (consecutive Write - Read) 12 ns - 182 ns th1 Hold A valid after CSBrising edge 0 ns - - th2 Hold WRB valid after CSBrising edge 0 ns - - th3 Hold CSB Low after RDYfalling edge 0 ns - - tp Time between (consecutive Read - Read) accesses (CSBrising edge to CSBfalling edge) 15 ns - - tp Time between (consecutive Write - Read) accesses (CSBrising edge to CSBfalling edge) 160 ns - - F8110D_007ReadAccMotor_01 CSB WRB A AD RDY (DTACK) X X address Z Z X X Z tpw1 tsu2 tsu1 td1 td2 th1 th2 tpw2 th3 td4 td3 data Z |
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