参数资料
型号: M35047-002FP
元件分类: 显示控制器
英文描述: 24 X 12 CHARACTERS CRT CHAR DSPL CTLR, PDSO20
封装: 0.300 INCH, PLASTIC, SSOP-20
文件页数: 14/43页
文件大小: 522K
代理商: M35047-002FP
MITSUBISHI MICROCOMPUTERS
M35047-XXXSP/FP
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
20
REGISTER SUPPLEMENTARY DESCRIPTION
(1) Setting external clock input and display frequency mode
Setting external clock input and display frequency mode (by
use of EXCK0, EXCK1 (12116) 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) = (0, 1) ......Internal
synchronous… Fosc = 20 to 100 MHz
Clock input from the TCK pin is unnecessary. The multiply
clock of the internally generated horizontal synchronous
signal is used as the display clock.
The display frequency is set by setting the multiply value of
the horizontal synchronous frequency (of the display
frequency) in DIV10 to DIV0 (address 12016). Also, set the
display frequency range. (See the next page.)
Display frequency is calculated using the below expres-
sion.
Display frequency =Horizontal synchronous frequency !
Multiply value
(c) When (EXCK1, EXCK0) = (1, 0) ......… Setting disabled
(d) When (EXCK1, EXCK0) = (1, 1) ......External synchronous 2
(Internal oscillation clock display) … Fosc = 20 to 100 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. 12 Example of external clock input
2nDIVn
10
Σ
n = 0
Horizontal synchronous signal
External clock
Number of clock (N1)
1H
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