DocID027351 Rev 3
35/100
UM1855
Hardware layout and configuration
99
The custom LCD glass module used on MB979 daughterboard is XHO5002B. To optimize
the number of driving signals, the display elements are connected to eight common planes
called COMx (LCDCOMx in the schematic digrams), where “x” can be substituted with
figures from “0” to “7”. The other pole of each display element is called segment, SEGy
(LCDSEGy in the schematic diagrams), where “y” can be substituted with figures from “0” to
“39”. Each combination of COMx and SEGy addresses one display element.
Table 15
,
Table 16
,
Table 17
and
Table 22
show the LCD element mapping. COMx are ordered in
rows, SEGy in columns. The table cells then display the display element names
SEG11
R48
In
PB11 routed to LCDSEG11
SB8
Open
PB11 not routed to Quad-SPI Flash memory device
SEG12
R39
In
PB12 routed to LCDSEG12
SB3
Open
PB12 not routed to Quad-SPI Flash memory device
SEG13
R38
In
PB13 routed to LCDSEG13
SB6
Open
PB13 not routed to Touch sensing
SEG18
R97
In
PC0 routed to LCDSEG18
SB34
Open
PC0 not routed to motor control
SEG19
R98
In
PC1 routed to LCDSEG19
SB36
Open
PC1 not routed to motor control
SEG20
R99
In
PC2 routed to LCDSEG20
SB42
Open
PC2 not routed to motor control
SEG22
R65
In
PC4 routed to LCDSEG22
SB17
Open
PC4 not routed to motor control
SEG23
R64
In
PC5 routed to LCDSEG23
SB16
Open
PC5 not routed to motor control
SEG24
R36
In
PC6 routed to LCDSEG24
SB2
Open
PC6 not routed to Touch sensing
SB27
Open
PC6 not routed to for motor control
SEG25
R33
In
PC7 routed to LCDSEG25
SB4
Open
PC7 not routed to Touch sensing
SB30
Open
PC7 not routed to for motor control
SEG26
SB28
Open
PC8 not routed to motor control
SEG27
SB29
Open
PC9 not routed to motor control
SEG38
R103
In
PE2 routed to LCDSEG38
SB26
Open
PE2 not routed to Trace
SEG39
R104
In
PE3 routed to LCDSEG39
Table 14. LCD-daughterboard-related configuration elements (continued)
LCD
segment
Element
Setting to enable
LCD glass
module
Description
