mc68hc05l25 Freescale Semiconductor, Inc, mc68hc05l25 Datasheet - Page 107

• Manufacturer Part Number: mc68hc05l25
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

11.5 LCD Connection and LCD Driver Operation
The connection between the MC68HC05L25 and the seven segments of the LCD panel is discussed in
the following paragraphs.
Figure 11-9
Pins BP0, BP1, BP2, FP0, FP1, and FP2 output the waveforms illustrated in
Freescale Semiconductor
illustrates a 1/3 duty example.
f
e
FP CONNECTION
The segment assignments for each bit in the data latch are:
(X . . . don’t care)
To display a 4 using the assignments above will have the following data
written to LDAT1 and LDAT2.
(e, f) (a, d, g) (b, c)
a
g
d
FP0 FP1 FP2
—
—
—
—
b
c
(Unrelated FP)
(Unrelated FP)
—
—
D
0
FP1
FP1
Figure 11-9. 1/3 Duty Example
MC68HC05L25 Data Sheet, Rev. 3.1
—
—
G
1
(—, X . . . are zero in this case)
—
—
A
0
f
e
(— means not assigned in this case)
a
g
d
—
—
—
—
BP CONNECTION
b
c
—
E
X
0
LCD Connection and LCD Driver Operation
FP0
FP2
FP0
FP2
BP0 (a, b CONNECTED)
BP1 (c, f, g CONNECTED)
BP2 (d, e CONNECTED)
F
C
1
1
Figure
—
B
X
1
11-10.
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