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ML9058E Datasheet(PDF) 20 Page - LAPIS Semiconductor Co., Ltd. |
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ML9058E Datasheet(HTML) 20 Page - LAPIS Semiconductor Co., Ltd. |
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20 / 76 page  FEDL9058E-01 LAPIS Semiconductor ML9058E 20/76 FUNCTIONAL DESCRIPTION MPU Interface MPU Read mode Write mode 80-Series Pin RD = “L” Pin WR = “L” Pin R/ W = “H” Pin R/ W = “L” 68-Series Pin E = “H” Pin E = “H” In the case of the 80-series MPU interface, a command is started by applying a low pulse to the RD pin or the WR pin. In the case of the 68-series MPU interface, a command is started by applying a high pulse to the E pin. Selection of interface type The ML9058E carries out data transfer using either the 8-bit bi-directional data bus (DB0 to DB7) or the serial data input line (SI). Either the 8-bit parallel data input or serial data input can be selected as shown in Table 2 by setting the P/S pin to the “H” or the “L” level. Table 2 Selection of interface type (parallel/serial) P/ S CS1 CS2 A0 RD WR C86 D7 D6 DB0 to DB5 H: Parallel input L: Serial input CS1 CS1 CS2 CS2 A0 A0 RD — WR — C86 — D7 SI D6 SCL DB0 to DB5 — A hyphen (—) indicates that the pin can be tied to the “H” or the “L” level. Parallel interface When the parallel interface is selected, (P/S = “H”), it is possible to connect this LSI directly to the MPU bus of either an 80-series MPU or a 68-series MPU as shown in Table 3. depending on whether the pin C86 is set to “H” or “L”. Table 3 Selection of MPU during parallel interface (80–/68–series) C86 CS1 CS2 A0 RD WR DB0 to DB7 H: 68-Series MPU bus L: 80-Series MPU bus CS1 CS1 CS2 CS2 A0 A0 E RD R/ W WR DB0 to DB7 DB0 to DB7 The data bus signals are identified as shown in Table 4 below depending on the combination of the signals A0, RD (E), and WR (R/W) of Table 3. Table 4 Identification of data bus signals during parallel interface Common 68-Series 80-Series A0 R/ W RD WR Display data read Display data write Status read Control data write (command) 1 1 0 0 1 0 1 0 0 1 0 1 1 0 1 0 |
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