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ST7787 Datasheet(PDF) 34 Page - Sitronix Technology Co., Ltd. |
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ST7787 Datasheet(HTML) 34 Page - Sitronix Technology Co., Ltd. |
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34 / 217 page  ST7787 V1.7 2008.04.18 34 9. Function description 9.1 Interface type selection The selection of given interfaces are done by setting P68, IM2, IM1, and IM0 pins as shown in following table. P68 IM2 IM1 IM0 Interface Read back selection - 0 - - 3-line serial interface Via the read instruction 0 1 0 0 8080 8-bit parallel RDX strobe (8-bit read data and 8-bit read parameter) 0 1 0 1 8080 16-bit parallel RDX strobe (16-bit read data and 8-bit read parameter) 0 1 1 0 8080 9-bit parallel RDX strobe (9-bit read data and 8-bit read parameter) 0 1 1 1 8080 18-bit parallel RDX strobe (18-bit read data and 8-bit read parameter) - 0 - - 3-line serial interface Via the read instruction 1 1 0 0 6800 8-bit parallel E strobe (8-bit read data and 8-bit read parameter) 1 1 0 1 6800 16-bit parallel E strobe (16-bit read data and 8-bit read parameter) 1 1 1 0 6800 9-bit parallel E strobe (9-bit read data and 8-bit read parameter) 1 1 1 1 6800 18-bit parallel E strobe (18-bit read data and 8-bit read parameter) P68 IM2 IM1 IM0 Interface RDX WRX D/CX Read back selection - 0 - - 3-line serial interface Note1 Note1 SCL D[17:1]: unused, D0: SDA 0 1 0 0 8080 8-bit parallel RDX WRX D/CX D[17:8]: unused, D7-D0: 8-bit data 0 1 0 1 8080 16-bit parallel RDX WRX D/CX D[17:16]: unused, D15-D0: 16-bit data 0 1 1 0 8080 9-bit parallel RDX WRX D/CX D[17:9]: unused, D8-D0: 9-bit data 0 1 1 1 8080 18-bit parallel RDX WRX D/CX D17-D0: 18-bit data 1 1 0 0 6800 8-bit parallel E WRX RS D[17:8]: unused, D7-D0: 8-bit data 1 1 0 1 6800 16-bit parallel E WRX RS D[17:16]: unused, D15-D0: 16-bit data 1 1 1 0 6800 9-bit parallel E WRX RS D[17:9]: unused, D8-D0: 9-bit data 1 1 1 1 6800 18-bit parallel E WRX RS D17-D0: 18-bit data Note 1. Unused pins can be open, or connected to DGND or VDDI. 9.2 8080-series MCU parallel interface (P68=’0’) The MCU can use on of following interfaces: 11-lines with 8-data parallel interface, 12-lines with 9-data parallel interface, 19-lines with 16-data parallel interface or 21-lines with 18-data parallel interface. The chip-select CSX (active low) enables/disables the parallel interface. RESX (active low) is an external reset signal. WRX is the parallel data write, RDX is the parallel data read and D[17:0] is parallel data. The graphics controller chip reads the data at the rising edge of WRX signal. The D/CX is the data/command flag. When D/CX=’1’, D[17:0] bits are either display data or command parameters. When D/C=’0’, D[17:0] bits are commands. The 6800-series bi-directional interface can be used for communication between the micro controller and LCD driver chip. The selection of this interface is done when P68 pin is in low state (DGND). Interface bus width can be selected with IM2, IM1 and IM0. The interface functions of 8080-series parallel interface are given in following table. P68 IM2 IM1 IM0 Interface RDX WRX D/CX Read back selection 0 1 ↑ Write 8-bit command (D7 to D0) 1 1 ↑ Write 8-bit display data or 8-bit parameter (D7 to D0) 1 ↑ 1 Read 8-bit display data (D7 to D0) 0 1 0 0 8-bit parallel 1 ↑ 1 Read 8-bit parameter or status (D7 to D0) 0 1 ↑ Write 8-bit command (D7 to D0) 1 1 ↑ Write 16-bit display data or 8-bit parameter (D15 to D0) 1 ↑ 1 Read 16-bit display data (D15 to D0) 0 1 0 1 16-bit parallel 1 ↑ 1 Read 8-bit parameter or status (D7 to D0) 0 1 ↑ Write 8-bit command (D7 to D0) 1 1 ↑ Write 9-bit display data or 8-bit parameter (D8 to D0) 1 ↑ 1 Read 9-bit display data (D8 to D0) 0 1 1 0 9-bit parallel 1 ↑ 1 Read 8-bit parameter or status (D7 to D0) 0 1 ↑ Write 8-bit command (D7 to D0) 1 1 ↑ Write 18-bit display data or 8-bit parameter (D17 to D0) 1 ↑ 1 Read 18-bit display data (D17 to D0) 0 1 1 1 18-bit parallel 1 ↑ 1 Read 8-bit parameter or status (D7 to D0) Note: applied for command code: DAh, DBh, DCh, 04h, 09h, 0Ah, 0Bh, 0Ch, 0Dh, 0Eh, 0Fh |
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