參數(shù)資料
型號: μPD780306Y
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 27/72頁
文件大小: 531K
代理商: ΜPD780306Y
μ
PD780306Y, 780308Y
27
5.8
LCD CONTROLLER/DRIVER
An LCD controller/driver with the following functions is incorporated.
Selection of 5 types of display mode
16 of the segment signal of outputs can be switched to input/output ports in units of 2.
(P80/S39 to P87/S32, P90/S31 to P97/S24)
Table 5-4. Display Mode Types and Maximum Number of Display Pixels
Bias Method
Time Multiplexing
Common Signal Used
Maximum Number of Display Pixels
Static
COM0 (COM1 to COM3)
40 (40 segments
×
1 common)
1/2
2
COM0, COM1
80 (40 segments
×
2 commons)
3
COM0 to COM2
120 (40 segments
×
3 commons)
1/3
3
COM0 to COM2
4
COM0 to COM3
160 (40 segments
×
4 commons)
Figure 5-12. LCD Controller/Driver Block Diagram
V
LC2
V
LC1
V
LC0
BIAS
COM3
COM2
COM1
COM0
S39/P80
S0
S23
S24/P97
LCDCL
f
W
2
9
f
W
2
8
f
W
2
7
f
W
2
6
Internal bus
Display
data memory
Segment
data selector
Port
output data
Segment driver
Prescaler
Selector
Timing controller
LCD drive voltage
generator
Common driver
LCD drive mode
switch circuit
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