BeagleBone LCD7 Cape
System Reference Manual
Revision A3
Page 10 of 27
2.0
Change History
2.1
Change History
Table 1 tracks the changes made for each revision of this document.
Table 1.
Change History
Rev
Changes
Date
By
A1
Initial release.
04/25/2012
BBT
A2
1. LCD_AVDD_EN Signal is moved from J2-42 (GPIO0_7) to J1-20
(GPIO1_31)
2. PCB revision changed from -01 to -02
06/21/2012
BBT
A3
Add A2 vs. A3 section (2.2)
09/01/2012
BBT
2.2
A2 vs. A3
In revision A3 the Enter button has been moved from GPIO3_19 to GPIO0_3 and
LCD_DVDD_EN has moved from GPIO1_31 to GPIO0_2. These changes in GPIOs are
to support awake interrupt in sleeping mode.
The PCB revision is also changed from BB-Bone-LCD7-PCB-03 to BB-Bone-LCD7-
PCB-04.
2.3
A1 vs. A2
The only design change in A2 is that the LCD_AVDD_EN signal is moved from pin 42
of connector J2 to pin 20 of connector J1. In revision A1, LCD_AVDD_EN signal is
mapped to GPIO0_7 which is also a DMA interrupt. By moving LCD_AVDD_EN
signal, this DMA interrupt is now available when BeagleBone is used with LCD7 Cape.
Both revisions should not have any functional difference.
The PCB revision is also changed from -02 to -03.
