參數(shù)資料
型號: M35075-001FP
元件分類: 顯示控制器
英文描述: 24 X 12 CHARACTERS CRT CHAR DSPL CTLR, PDSO24
封裝: 0.300 INCH, 0.80 MM PITCH, PLASTIC, SSOP-24
文件頁數(shù): 15/47頁
文件大小: 357K
代理商: M35075-001FP
Rev.1.10
Feb 13, 2006
page 20 of 44
REJ03B0180-0110
M35075-XXXFP
Fig. 12 Example of external clock input
Horizontal synchronous signal
External clock
Number of clock (N1)
1H
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 clock mode 1
Fosc = 6.3 to 80 MHz (VDD = 4.75 to 5.25 V)
Fosc = 6.3 to 40 MHz (VDD = 2.50 to 3.50 V)
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 clock mode
Fosc = 20 to 110 MHz (VDD = 4.75 to 5.25 V)
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 expression.
Display frequency = Horizontal synchronous frequency x
Multiply value
10
Σ
n = 0
2nDIVn
(c) When (EXCK1, EXCK0) = (1, 0) ......… Setting disabled
(d) When (EXCK1, EXCK0) = (1, 1) ......External clock mode 2
Fosc = 20 to 110 MHz (VDD = 4.75 to 5.25 V)
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.)
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