BeagleBone BBONEBLK_SRM, Reference Manual

Page: 82 / 108

REF: BBONEBLK_SRM
BeagleBone Black System
Reference Manual
Rev A5.2
Page 82 of 108
8.1 BeagleBoneBlack Cape Compatibility
The main expansion headers are the same between the BeagleBone and BeagleBone
Black. While the pins are the same, some of these pins are now used on the BeagleBone
Black. The following sections discuss these pins.
The Power Expansion header was removed from the BeagleBone Black and is not
available.
PAY VERY CLOSE ATTENTION TO THIS SECTION AND READ CAREFULLY!!
8.1.1 LCD Pins
The LCD pins are used on the BeagleBone Black to drive the HDMI framer. These
signals are listed in
Table 12 below.
Table 12. P8 LCD Conflict Pins
PIN PROC NAME MODE0
27 U5 GPIO2_22 lcd_vsync
28 V5 GPIO2_24 lcd_pclk
29 R5 GPIO2_23 lcd_hsync
30 R6 GPIO2_25 lcd_ac_bias_en
31 V4 UART5_CTSN lcd_data14
32 T5 UART5_RTSN lcd_data15
33 V3 UART4_RTSN lcd_data13
34 U4 UART3_RTSN lcd_data11
35 V2 UART4_CTSN lcd_data12
36 U3 UART3_CTSN lcd_data10
37 U1 UART5_TXD lcd_data8
38 U2 UART5_RXD lcd_data9
39 T3 GPIO2_12 lcd_data6
40 T4 GPIO2_13 lcd_data7
41 T1 GPIO2_10 lcd_data4
42 T2 GPIO2_11 lcd_data5
43 R3 GPIO2_8 lcd_data2
44 R4 GPIO2_9 lcd_data3
45 R1 GPIO2_6 lcd_data0
46 R2 GPIO2_7 lcd_data1
If you are using these pins for other functions, there are a few things to keep in mind:

On the HDMI Framer, these signals are all inputs so the framer will not be driving
these pins.

The HDMI framer will add a load onto these pins.

There are small filter caps on these signals which could also change the operation
of these pins if used for other functions.