
ST7735R
V0.2
27
2009-08-05
9.2 8080-series MCU parallel interface (P68 = ‘0’)
The MCU can use one of following interfaces: 11-lines with 8-data parallel interface, 12-lines with 9-data parallel interface,
19-line 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 enable,
RDX is the parallel data read enable and D[17:0] is parallel data bus.
The LCD driver 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 is either display data or command parameter. When D/C=’0’, D[17:0] bits is command. The interface functions
of 8080-series parallel interface are given in following table.
IM2
IM1
IM0
Interface
D/CX
RDX
WRX
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)
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)
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)
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)
1
1
1
18-bit
parallel
1
↑
1
Read 8-bit parameter or status (D7 to D0)
Table 9.2.1 the function of 8080-series parallel interface
Note: applied for command code: DAh, DBh, DCh, 04h, 09h, 0Ah, 0Bh, 0Ch, 0Dh, 0Eh, 0Fh
Содержание ST7735R
Страница 31: ...ST7735R V0 2 31 2009 08 05 Figure 9 3 2 6800 series parallel bus protocol write to register or display RAM ...
Страница 92: ...ST7735R V0 2 92 2009 08 05 Flow Chart ...
Страница 103: ...ST7735R V0 2 103 2009 08 05 Flow Chart ...
Страница 110: ...ST7735R V0 2 110 2009 08 05 Flow Chart ...
Страница 133: ...ST7735R V0 2 133 2009 08 05 Flow Chart ...
Страница 135: ...ST7735R V0 2 135 2009 08 05 Flow Chart ...
Страница 137: ...ST7735R V0 2 137 2009 08 05 Flow Chart ...
Страница 141: ...ST7735R V0 2 141 2009 08 05 Flow Chart ...
Страница 149: ...ST7735R V0 2 149 2009 08 05 Flow Chart ...