STMicroelectronics SPEAr300, Reference Manual

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RS_Color liquid crystal display controller (CLCD) RM0082
740/844 Doc ID 018672 Rev 1
33.5 Main functions description
This section describes the main functions of crystal liquid crystal display controller.
33.5.1 AHB slave interface
The AMBA AHB slave interface connects the CLCD to the AMBA AHB bus and provides
CPU accesses to the registers and palette RAM. For more information on AMBA AHB slave
interfaces, refer to the
AMBA specification (Rev 2.0) .
The following features are supported by the CLCD AMBA AHB slave interface:
● Standard write and read AMBA AHB accesses
●
INCR4, INCR8, and undefined length WORD bursts only
● OKAY response only.
33.5.2 AHB master interface
The AMBA AHB master interface transfers display data from a memory to the PrimeCell
CLCD DMA FIFOs.
CLD[19] BLUE[3] Reserved
CLD[18] BLUE[2] Reserved
CLD[17] BLUE[1] BLUE[4]
CLD[16] BLUE[0] BLUE[3]
CLD[15] GREEN[7] BLUE[2]
CLD[14] GREEN[6] BLUE[1]
CLD[13] GREEN[5] BLUE[0]
CLD[12] GREEN[4] Intensity Bit
CLD[11] GREEN[3] GREEN[4]
CLD[10] GREEN[2] GREEN[3]
CLD[9] GREEN[1] GREEN[2]
CLD[8] GREEN[0] GREEN[1]
CLD[7] RED[7] GREEN[0]
CLD[6] RED[6] Intensity Bit
CLD[5] RED[5] RED[4]
CLD[4] RED[4] RED[3]
CLD[3] RED[3] RED[2]
CLD[2] RED[2] RED[1]
CLD[1] RED[1] RED[0]
CLD[0] RED[0] Intensity Bit
Table 664. LCD TFT panel signal multiplexing (continued)
External pin TFT 24 bit TFT 18 bit