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CHAPTER 16 LCD CONTROLLER/DRIVER
16.2 LCD Controller/Driver Configuration
The LCD controller/driver consists of the following hardware.
Table 16-2. LCD Controller/Driver Configuration
Item
Configuration
Display outputs
Segment signals : 20
Dedicated segment signals: 5
Segment signal/input/output port alternate function: 14
Segment signal/input/output port/16-bit timer prescaler output alternate
function: 1
Common signals : 4 (COM0 to COM3)
Control registers
LCD display mode register (LCDM)
LCD display control register (LCDC)
Figure 16-1. LCD Controller/Driver Block Diagram
Internal bus
FA59H
7 6 5 4 3 2 1 0
FA67H
7 6 5 4 3 2 1 0
FA68H
7 6 5 4 3 2 1 0
FA6CH
7 6 5 4 3 2 1 0
Display data memory
3 2 1 0
selector
3 2 1 0
selector
3 2 1 0
selector
3 2 1 0
selector
………
………
Note
Note
Note
Note
P97 output
buffer
S4
S0
………
………
……………
………
S5/P97
P81 output
buffer
S19/P81
Segment selector
Common driver
COM0
COM3
COM1 COM2
LCD driver voltage controller
V
LCD
LCDON LCDM6 LCDM5 LCDM4
LCD clock selector
f
LCD
3
LCD display mode register (LCDM)
LCDC6 LCDC5 LCDC4 LIPS
LCD display control register (LCDC)
4
………………
………
Timing controller
LCDC7
Note Segment driver
Содержание mPD780973 Series
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