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ST7533 Datasheet(PDF) 9 Page - Sitronix Technology Co., Ltd. |
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ST7533 Datasheet(HTML) 9 Page - Sitronix Technology Co., Ltd. |
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9 / 60 page  ST7533 Ver 1.0 9/60 2003/07/21 System Bus Connection Pins Pin Name I/O Function No. of Pins D5 to D0 D6 (SCL) D7 (SI) I/O This is an 8-bit bi-directional data bus that connects to an 8-bit or 16-bit standard MPU data bus. When the serial interface is selected (P/S = “L”) : D7 : serial data input (SI) ; D6 : the serial clock input (SCL). D0 to D5 are set to high impedance. When the chip select is not active, D0 to D7 are set to high impedance. 8 A0 I This is connect to the least significant bit of the normal MPU address bus, and it determines whether the data bits are data or a command. A0 = “H”: Indicates that D0 to D7 are display data. A0 = “L”: Indicates that D0 to D7 are control data. 1 /RES I When /RES is set to “L,” the settings are initialized. The reset operation is performed by the /RES signal level. 1 /CS1 CS2 I This is the chip select signal. When /CS1 = “L” and CS2 = “H,” then the chip select becomes active, and data/command I/O is enabled. 2 /RD (E) I • When connected to an 8080 MPU, this is active LOW. (E) This pin is connected to the /RD signal of the 8080 MPU, and the ST7533 series data bus is in an output status when this signal is “L”. • When connected to a 6800 Series MPU, this is active HIGH. This is the 6800 Series MPU enable clock input terminal. 1 /WR (R/W) I • When connected to an 8080 MPU, this is active LOW. (R/W) This terminal connects to the 8080 MPU/WR signal. The signals on the data bus are latched at the rising edge of the /WR signal. • When connected to a 6800 Series MPU: This is the read/write control signal input terminal. When R/W = “H”: Read. When R/W = “L”: Write. 1 C86 I This is the MPU interface switch terminal. C86 = “H”: 6800 Series MPU interface. C86 = “L”: 8080 MPU interface. 1 P/S I This is the parallel data input/serial data input switch terminal. P/S = “H”: Parallel data input. P/S = “L”: Serial data input. The following applies depending on the P/S status: When P/S = “L”, D0 to D5 fixed to either “H”. /RD (E) and /WR (R/W) are fixed to either “H” or “L”. With serial data input, It is impossible read data from RAM . P/S Data/Command Data Read/Write Serial Clock “H” A0 D0 to D7 /RD, /WR X “L” A0 SI (D7) Write only SCL (D6) 1 |
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