參數(shù)資料
型號(hào): M3720
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER and ON-SCREEN DISPLAY CONTROLLER
中文描述: 單芯片8位CMOS微機(jī)電壓合成器和屏幕顯示控制器
文件頁數(shù): 50/121頁
文件大?。?/td> 1907K
代理商: M3720
MITSUBISHI MICROCOMPUTERS
M37207MF-XXXSP/FP, M37207M8-XXXSP
M37207EFSP/FP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
and ON-SCREEN DISPLAY CONTROLLER
50
The display position in the vertical direction is determined by count-
ing the horizontal sync signal (H
SYNC
). At this time, when V
SYNC
and
H
SYNC
are positive polarity (negative polarity), it starts to count the
rising edge (falling edge) of H
SYNC
signal from after fixed cycle of
rising edge (falling edge) of V
SYNC
signal. So interval from rising edge
(falling edge) of V
SYNC
signal to rising edge (falling edge) of H
SYNC
signal needs enough time (2 machine cycles or more) for avoiding
jitter. The polarity of H
SYNC
and V
SYNC
signals can select with the
CRT port control register (address 00EC
16
).
Fig. 48. Vertical Position Register i
Fig. 47. Supplement Explanation for Display Position
When bits 0 and 1 of the CRT port control register
(address 00EC
16
) are set to “1” (negative polarity)
V
SYNC
signal input
V
control
signal in
microcomputer
Period of counting
H
SYNC
signal
0.125 to 0.50 [
μ
s]
( at f(X
IN
) = 8MHz)
(Note 2)
H
signal input
Not count
1
2
3
4
5
Notes 1 :
The vertical position is determined by counting falling edge of H
SYNC
signal after rising edge of V
SYNC
control signal in the microcomputer.
2 :
Do not generate falling edge of H
SYNC
signal near rising edge of
V
SYNC
control signal in microcomputer to avoid jitter.
8 machine cycles
or more
8 machine cycles
or more
b7 b6 b5 b4 b3 b2 b1 b0
Vertical position register i (CVi) (i = 1 to 3) [Addresses 00E1
16
to 00E3
16
]
B
Name
Functions
After reset
R W
Vertical Position Register i
0
to
6
7
Vertical display start positions
(CVi : CVi0 to CVi6)
128 steps (00
16
to 7F
16
)
Indeterminate
0
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
R W
R —
相關(guān)PDF資料
PDF描述
M3720 1 KEY 1 SOUND
M3720-1 1 KEY 1 SOUND
M3720-10 1 KEY 1 SOUND
M3720-2 1 KEY 1 SOUND
M3720-3 1 KEY 1 SOUND
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M3720-1 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-10 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-2 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND
M3720-4 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1 KEY 1 SOUND