UM1574 Hardware and layout
Doc ID 023645 Rev 1 31/48
4.3.5 STM8AL board LCD (16 segments, 4 commons)
This LCD allows the STM8AL3L68T to display any information on four 14-segment digits
and 4 BARs, using all COMs. (See the LCD segment mapping in Figure 18 and pin
connections in Table 7 ). The two first left digits of the LCD display are not used in this
application.
Characteristics overview:
● 16 segments and 4 commons
● Drive method: multiplexed 1/4 duty, 1/3 bias
● Operating voltage: 3 V
● Operating temperature: 0 to 50°C
● Connector: 28-pin DIL 2.54 mm pitch
Note: When the LCD is plugged in, all I/O ports listed in Tab l e 7 are unavailable. To use one of
these as I/O, you must remove the LCD
Figure 18. LCD segment mapping
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