UM0970

Hardware and layout

Doc ID 17693 Rev 2

17/30

3.8

LCD (24 segments, 4 commons)

This LCD allows the STM8L152C6T6 to display any information on six 14-segment digits

and 4 BARs, using all COMs. (See the LCD segment mapping in Figure 12 and pin

connections in Table 5.)

Note:

This LCD also supports six 8-segment digits by only using COM0 and COM1.

This configuration allows COM2 and COM3 to be used as I/O ports. In this case the 2 LCD

pins must not be plugged into the LCD socket. To proceed with this configuration, remove

the LCD carefully, slightly open the COM2 and COM3 pins (pin 13 and pin 14) of the LCD,

then replug it in the socket.

Characteristics overview:

●

24 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, all I/O ports listed in Table 5 are unavailable. To use one of these

as I/O, you must remove the LCD.

Figure 12.

LCD segment mapping