TFT LCD, 16 RGB bit and 24 Bit RGB connection crosscheck

Santosh Bongane1

AM335X	Signal Name	Connector Pins	LCD Panel Signal	SOM Pin
R1	LCD_DATA0	Red Data R3	Red Bit 1	Used when TFT LCD in 16 bit RGB connection
R2	LCD_DATA1	Red Data R4	Red Bit 2
R3	LCD_DATA2	Red Data R5	Red Bit 3
R4	LCD_DATA3	Red Data R6	Red Bit 4
T1	LCD_DATA4	Red Data R7	Red Bit 5
T2	LCD_DATA5	Green Data G2	Green Bit 0
T3	LCD_DATA6	Green Data G3	Green Bit 1
T4	LCD_DATA7	Green Data G4	Green Bit 2
U1	LCD_DATA8	Green Data G5	Green Bit 3
U2	LCD_DATA9	Green Data G6	Green Bit 4
U3	LCD_DATA10	Green Data G7	Green Bit 5
U4	LCD_DATA11	Blue data B3	LCD Blue Bit 1
V2	LCD_DATA12	Blue data B4	LCD Blue Bit 2
V3	LCD_DATA13	Blue data B5	LCD Blue Bit 3
V4	LCD_DATA14	Blue data B6	LCD Blue Bit 4
T5	LCD_DATA15	Blue data B7	LCD Blue Bit 5
U13	LCD_DATA16	Red Data R2	Red Bit 2	Used when LCD RGB 24 bit connection
V13	LCD_DATA17	Blue data B2	LCD Blue Bit 2
R12	LCD_DATA18	Red Data R1	Red Bit 1
T12	LCD_DATA19	Green Data G1	Green Bit 1
U12	LCD_DATA20	Blue data B1	LCD Blue Bit 1
T11	LCD_DATA21	Red Data R0	Red Bit 0
T10	LCD_DATA22	Green Data G0	Green Bit 0
U10	LCD_DATA23	Blue data B0	LCD Blue Bit 0
U5	LCD_VSYNC	LCD_VSYNC	LCD_VSYNC	24
R5	LCD_HSYNC	LCD_HSYNC	LCD_HSYNC	20
V5	LCD_PCLK	LCD_PCLK	LCD_PCLK	22
R6	LCD_AC_BIAS_EN	LCD_AC_BIAS_EN	LCD_AC_BIAS_EN	21

Hi , Kindly confirm the connection scheme for two different LCD's. At a time only one LCD can be used, it is alternative for each other as per requirement.

LCD RGB configured as per 565 configuration for 7 "LCD and RGB 24 bit configuration for LCD 4.3 Inch.

we are used LCD from Kyocera make TCG070WVLQAPNN-AN00-Base and TCG043WQLBAANN-GN00-Base

kindly confirm the same is correct or not? also refer TI Errata 3.1.1 while checking.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Note that RED[7:3] and BLUE[7:3] are swapped for 16 and 24 bit modes. This is clearly shown in the Errata you mention above.

0 Santosh Bongane1 over 10 years ago in reply to Biser Gatchev-XID

Intellectual 375 points

Okay, But for 16 bit LCD connection shown in the table given is correct ?

i.e. following LCD RGB signals mapped to AM335X LCD Data signals (shown in the table before this )

LCD Data bit B4 BLUE data signal
LCD Data bit B3 BLUE data signal
GND GND
LCD Data bit B2 BLUE data signal
LCD Data bit B1 BLUE data signal
LCD Data bit  B0 BLUE data signal (LSB)
GND GND
LCD Data bit G5 GREEN data signal (MSB)
LCD Data bit G4 GREEN data signal
LCD Data bit  G3 GREEN data signal
GND GND
LCD Data bit  G2 GREEN data signal
LCD Data bit  G1 GREEN data signal
LCD Data bit  G0 GREEN data signal (LSB)
LCD Data bit  GND GND
LCD Data bit  R5 RED data signal (MSB)
LCD Data bit  R4 RED data signal
LCD Data bit  R3 RED data signal
GND GND
LCD Data bit  R2 RED data signal
LCD Data bit  R1 RED data signal
LCD Data bit  R0 RED data signal (LSB) connected to GND for 16 bit

0 Biser Gatchev-XID over 10 years ago in reply to Santosh Bongane1

TI__Guru**** 393215 points

Seems correct.

0 Santosh Bongane1 over 10 years ago in reply to Biser Gatchev-XID

Intellectual 375 points

Okay, But for 16 bit LCD connection shown in the table given is correct or not ?

i.e. following LCD RGB signals mapped to AM335X LCD Data signals (shown in the table before this )

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TFT LCD, 16 RGB bit and 24 Bit RGB connection crosscheck