Datasheet

ST7735
V1.7 25 2009-12-04
9 Function description
9.1 Interface type selection
The selection of given interfaces are done by setting IM2, IM1, and IM0 pins as shown in following table.
IM2 IM1 IM0 Interface Read back selection
0 - - 3-line serial interface Via the read instruction
1 0 0 8080 MCU 8-bit parallel RDX strobe (8-bit read data and 8-bit read parameter)
1 0 1 8080 MCU 16-bit parallel RDX strobe (16-bit read data and 8-bit read parameter)
1 1 0 8080 MCU 9-bit parallel RDX strobe (9-bit read data and 8-bit read parameter)
1 1 1 8080 MCU 18-bit parallel RDX strobe (18-bit read data and 8-bit read parameter)
Table 9.1.1 Selection of MCU interface
IM2 IM1 IM0 Interface RDX WRX D/CX Read back selection
0 - - 3-line serial Note1 Note1 SCL D[17:1]: unused, D0: SDA
1 0 0 8080 8-bit parallel RDX WRX D/CX D[17:8]: unused, D7-D0: 8-bit data
1 0 1 8080 16-bit parallel RDX WRX D/CX D[17:16]: unused, D15-D0: 16-bit data
1 1 0 8080 9-bit parallel RDX WRX D/CX D[17:9]: unused, D8-D0: 9-bit data
1 1 1 8080 18-bit parallel RDX WRX D/CX D17-D0: 18-bit data
Table 9.1.2 Pin connection according to various MCU interface
Note1: Unused pins can be open, or connected to DGND or VDDI.