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參數(shù)資料
| 型號： | M35072-XXXFP |
| 元件分類： | 顯示控制器 |
| 英文描述： | 24 X 12 CHARACTERS CRT CHAR DSPL CTLR, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 9/40頁 |
| 文件大小： | 224K |
| 代理商： | M35072-XXXFP |
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MITSUBISHI MICROCOMPUTERS
M35072-XXXFP
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
17
REGISTER SUPPLEMENTARY DESCRIPTION
(1) Setting external clock input and display frequency mode
Setting external clock input and display frequency mode (by
use of EXCK0 (12016), EXCK1 (12316) and DIV10 to DIV0
(12016), as explained here following.
(a) When (EXCK1, EXCK0) = (0, 0) ......External synchronous
1 (External clock display) … Fosc = 20 to 70 MHz
Input from the TCK pin a constant-period continuous
external clock that synchronizes with the horizontal
synchronous signal. And input from HOR pin a constant
period continuous horizontal synchronous signal.
Never stop inputting the clock while displaying.
Do not have to set a display frequency because the clock
just as it is entered from outside is used as the display
clock.
(b) When (EXCK1, EXCK0) = Setting disabled
(c) When (EXCK1, EXCK0) = (1, 0) ......… Setting disabled
(d) When (EXCK1, EXCK0) = (1, 1) ......External synchronous 2
(Internal oscillation clock display) … Fosc = 20 to 80 MHz
Input from the TCK pin a constant-period continuous external
clock that synchronizes with the horizontal synchronous
signal. And input from HOR pin a constant-period continuous
horizontal synchronous signal.
Never stop inputting the clock while displaying.
An internal clock which is in sync with the external input clock
is used as the display clock.
Because the display frequency equals the external clock
frequency, set N1 (division value) that satisfies the below
expressions to DIV10 to DIV0 (address 12016) for make the
display frequency is equal to the external clock frequency.
N1 = external clock frequency / horizontal synchronous
frequency
N1 =
Also, set the display frequency range. (See the next page.)
Fig. 4
Example of external clock input
10
Σ
n = 0
2nDIVn
Horizontal synchronous signal
External clock
Number of clock (N1)
1H
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