UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 393

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

15.7 Display Modes
15.7.1 Static display example
to the segment signals (SEG0 to SEG21) and the common signal (COM0) of the 78K0/LC3 chip. This example
displays data "2.3" in the LCD panel. The contents of the display data memory (FA40H to FA55H) correspond to this
display.
panel, it is necessary to apply the select or deselect voltage to the SEG8 to SEG15 pins according to Table 15-5 at
the timing of the common signal COM0; see Figure 15-10 for the relationship between the segment signals and LCD
segments.
FA4FH) must be 10110111.
applied to SEG11 at the timing of COM0, an alternate rectangle waveform, +V
corresponding LCD segment.
together to increase the driving capacity.
Figure 15-11 shows how the three-digit LCD panel having the display pattern shown in Figure 15-10 is connected
The following description focuses on numeral "2." (
According to Table 15-5, it is determined that the bit-0 pattern of the display data memory locations (FA48H to
Figure 15-12 shows the LCD drive waveforms of SEG11 and SEG12, and COM0. When the select voltage is
COM1 to COM3 are supplied with the same waveform as for COM0. So, COM0 to COM3 may be connected
Remark
Common
COM0
n = 0, 2
Segment
SEG
SEG
Figure 15-10. Static LCD Display Pattern and Electrode Connections
8n+6
8n+4
SEG8
Select
Table 15-5. Select and Deselect Voltages (COM0)
SEG
SEG
8n+7
CHAPTER 15 LCD CONTROLLER/DRIVER
Deselect
SEG9
8n+3
User’s Manual U18698EJ1V0UD
SEG10
SEG
SEG
SEG
SEG
Select
8n+2
8n+5
8n+1
8n
) displayed in the second digit. To display "2." in the LCD
SEG11
Select
Deselect
SEG12
COM0
LCD
SEG13
Select
/ V
LCD
, is generated to turn on the
SEG14
Select
SEG15
Select
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