Sharp CD-BK1600V Service Manual

Also see for CD-BK1600V: Service manual

Contents

CD-BK1600V/1800V/190V– 54 –Pin No. Port Name Function1 VCC Power supply2-10 I/O0-I/O7 Data input/output11*,12* NC Not used13 WE Read/write enable14 RAS Row address strobe15* NC Not used16-19 A0-A3 Address input (row/refresh: A0 to A3) (Column: A0 to A3)20 VCC Power supply21 VSS Ground22-26 A4-A8 Address input (row/refresh: A4 to A8) (Column: A4 to A8)27 OE Output enable28,29 UCAS, LCAS Column address strobe30* NC Not used31-34 I/O8-I/O11 Data input/output35 VSS Ground36-39 I/O12-I/O15 Data input/output40 VSS GroundICV3 VHiSDM4260C-1: DRAM (SDM4260C)In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.RASLCASUCASWEA0A1A2A3A4A5A6A7A8VCCVSSI/O0I/O1I/O7I/O8I/O9I/O15OELowarUpperClock generatingcircuitLower dataInput bufferLower dataOutput bufferCoidmn decoderUpper dataInput bufferA0-A8A0-A8I/O control circuitMemory cell array Upper dataOutput bufferRoe decoderRow and column address buffer14292813161718192223242526 273932311032403521120Figure 54 BLOCK DIAGRAM OF IC