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<strong>ST7565</strong>The Common Output Status Select CircuitIn the <strong>ST7565</strong> chips, the COM output scan direction can beselected by the <strong>com</strong>mon output status select <strong>com</strong>mand.(See Table 6.) Consequently, the constraints in IC layout atthe time of LCD module assembly can be minimized.StatusNormalReverseTable 6COM Scan Direction1/65 DUTY 1/49 DUTY 1/33 DUTY 1/55 DUTY 1/53 DUTYCOM0 → COM63COM63 → COM0COM0 → COM47COM47 → COM0COM0 → COM31COM31 → COM0COM0 → COM53COM53 → COM0COM0 → COM51COM51 → COM0Duty1/651/491/331/551/53ComCommon output pinsdir <strong>com</strong>[0:15] <strong>com</strong>[16:23] <strong>com</strong>[24:26] <strong>com</strong>[27:36] <strong>com</strong>[37:39] <strong>com</strong>[40:47] <strong>com</strong>[48:63] <strong>com</strong>s0 <strong>com</strong>[0:63] <strong>com</strong>s1 <strong>com</strong>[63:0] <strong>com</strong>s0 <strong>com</strong>[0:23] <strong>com</strong>[24:47] <strong>com</strong>s1 <strong>com</strong>[47:24] <strong>com</strong>[23:0] <strong>com</strong>s0 <strong>com</strong>[0:15] <strong>com</strong>[16:31] <strong>com</strong>s1 <strong>com</strong>[31:16] <strong>com</strong>[15:0] <strong>com</strong>s0 <strong>com</strong>[0:26] <strong>com</strong>[27:53] <strong>com</strong>s1 <strong>com</strong>[53:27] <strong>com</strong>[26:0] <strong>com</strong>s0 <strong>com</strong>[0:25] <strong>com</strong>[26:51] <strong>com</strong>s1 <strong>com</strong>[51:26] <strong>com</strong>[25:0] <strong>com</strong>sThe LCD Driver CircuitsThese are a 197-channel, that generate four voltage levelsfor driving the LCD . The <strong>com</strong>bination of the display data, theCOM scan signal, and the FR signal produces the liquidcrystal drive voltage output.Figure 6 shows examples of the SEG and COM outputwave form.Ver 0.9 18/18 2001/01/11
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