Microchip Technology DM240312 Data Sheet
Development Board Hardware
2010 Microchip Technology Inc.
DS51911A-page 41
4.4.3.2
UART AND DISPLAY BACKLIGHT (RX SIGNAL)
The UART’s RX signal is mapped to only one pin (RD0) of the microcontroller. This pin
is also used by the development board to optionally control the backlight for the display
daughter board; all functions are multiplexed through the same jumper, JP12. If either
of the backlight control options is selected, the UART becomes unavailable to the exter-
nal RS-232 port.
is also used by the development board to optionally control the backlight for the display
daughter board; all functions are multiplexed through the same jumper, JP12. If either
of the backlight control options is selected, the UART becomes unavailable to the exter-
nal RS-232 port.
4.4.4
Graphics Port
The PIC24FJ256DA210 Development Board can support TFT, MSTN and CSTN
displays. Displays of 4, 8 and 16-bit data widths are supported. The 64-pin display Con-
nector V1 (J3) (on the right hand side bottom corner of the board) is provided for con-
nection of Microchip display boards.
displays. Displays of 4, 8 and 16-bit data widths are supported. The 64-pin display Con-
nector V1 (J3) (on the right hand side bottom corner of the board) is provided for con-
nection of Microchip display boards.
4.4.4.1
TFT AND STN INTERFACES
When developing applications using TFT displays and the Graphics Display Prototype
Board, the 16-bit display bus can be used to send 16-bit RGB data (5-6-5 bits respec-
tively) to a standard 24-bit (8-8-8) or 18-bit (6-6-6) RGB display. To do this, color data
from the microcontroller is mapped to the Most Significant bits (MSbs) of the display.
The Least Significant bit lines of the display (3-2-3 for 24-bit displays, 1-0-1 for 18-bit)
are then tied to the MSb. This technique allows full brightness whenever the MSb is ‘1’,
and full blackness when the MSb is ‘0’. The controller-to-display data mapping is
detailed in Table 4-5.
Board, the 16-bit display bus can be used to send 16-bit RGB data (5-6-5 bits respec-
tively) to a standard 24-bit (8-8-8) or 18-bit (6-6-6) RGB display. To do this, color data
from the microcontroller is mapped to the Most Significant bits (MSbs) of the display.
The Least Significant bit lines of the display (3-2-3 for 24-bit displays, 1-0-1 for 18-bit)
are then tied to the MSb. This technique allows full brightness whenever the MSb is ‘1’,
and full blackness when the MSb is ‘0’. The controller-to-display data mapping is
detailed in Table 4-5.
TABLE 4-5:
RGB INTERFACE MAPPING FOR TFT DISPLAYS
4.4.4.2
STN INTERFACES
The development board can directly interface with STN displays (both CSTN and
MSTN) of 4, 8 or 16-bit data width. The mapping of graphics data to the display data
input is described in Table 4-6. Configuration of the different data widths is done by the
graphics controller module through the register interface. Refer to the
“PIC24FJ256DA210 Family Data Sheet” (DS39969) for more information.
MSTN) of 4, 8 or 16-bit data width. The mapping of graphics data to the display data
input is described in Table 4-6. Configuration of the different data widths is done by the
graphics controller module through the register interface. Refer to the
“PIC24FJ256DA210 Family Data Sheet” (DS39969) for more information.
TABLE 4-6:
STN INTERFACE MAPPING
Graphics Data Pins (GDx)
18-Bit RGB Display
(6-6-6)
24-Bit RGB Display
(8-8-8)
RED
GD<15:11>
Red<5:1>
Red<7:3>
GD<15>
Red<0>
Red<2:0>
GREEN
GD<10:5>
Green<5:0>
Green<7:2>
GD<10>
Green<5>
Green<1:0>
BLUE
GD<4:0>
Blue<5:1>
Blue<7:3>
GD<4>
Blue<0>
Blue<2:0>
Graphics Data Pins (GDx)
4-bit
8-bit
16-bit
GD<3:0>
M<3:0>
M<3:0>
M<3:0>
GD<7:4>
Unused
M<7:4>
M<7:4>
GD<15:8>
Unused
Unused
M<15:8>