Data Sheet

Copyright © Bridgetek Pte Ltd 17
BT81X (815/6) Advanced Embedded Video Engine Datasheet
Version 1.0
Document No.: BRT_000220 Clearance No.: BRT#126
1st Byte
2nd byte
3rd byte
Command
Description
will be determined by its corresponding
GPIO register bits, if they exist. If they don’t
exist, a hard coded setting is used. Please
refer to Table 4-21 for default values.
When PINDRIVE for a pin from the SPI
command is updated, it will override the
corresponding setting in the GPIO register
bits.
Byte2 determines which pin and the setting
are to be updated.
Byte2[1:0] determine the drive strength.
For pins
R[7:0]/G[7:0]/B[7:0]/PCLK/DISP/HSYNC/V
SYNC/DE/BACKLIGHT:
Byte2[1:0]
Drive Strength
0h
1.2mA
1h
2.4mA
2h
3.6mA
3h
4.8mA
For all other pins:
Byte2[1:0]
Drive Strength
0h
5mA
1h
10mA
2h
15mA
3h
20mA
Byte2[7:2] determine which pin/pin group
to set:
Byte2
[7:2]
Pin / Pin Group
00h
GPIO 0
01h
GPIO 1
02h
GPIO 2
03h
GPIO 3
04-07h
Reserved