參數(shù)資料
型號: μPD780973(A)
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機(jī)微控制器
文件頁數(shù): 23/52頁
文件大?。?/td> 315K
代理商: ΜPD780973(A)
23
m
PD780973(A)
5.7 LCD Controller/Driver
An LCD controller/driver with the following functions is incorporated.
Display mode: 1/4 duty (1/3 bias)
15 of the segment signal of outputs can be switched to input/output ports in units of 2 (P81/S19 to P87/S13,
P90/S12 to P97/S5).
Table 5-3. Maximum Number of Display Pixels
Bias Method
Time Division
Common Signal Used
Maximum Number of Display Pixels
1/3
4
COM0 to COM3
80 (20 segments
4 commons)
Figure 5-13. LCD Controller/Driver Block Diagram
Internal bus
Display
data memory
Segment
data selector
Port
output data
Segment driver
Common driver
Timing controller
LCDCL
Selector
Prescaler
S0··········S4
S5/P97···········S19/P81
COM0 COM1 COM2 COM3
LCD drive voltage
generator
f
X
2
17
f
X
2
16
f
X
2
15
f
X
2
14
V
LCD
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