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| 型号： | M37224M3-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, 1.778 MM PITCH, SHRINK, PLASTIC, DIP-42 |
| 文件页数： | 32/83页 |
| 文件大小： | 901K |
| 代理商： | M37224M3-XXXSP |
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M37224M3-XXXSP
MITSUBISHI MICROCOMPUTERS
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
38
Fig. 37. Supplement Explanation for Display Position
The display position in the vertical direction is determined by count-
ing the horizontal sync signal (HSYNC). At this time when VSYNC and
HSYNC are positive polarity (negative polarity), it starts to count the
rising edge (falling edge) of HSYNC signal from after about 1 machine
cycle of rising edge (falling edge) of VSYNC signal. So interval from
rising edge (falling edge) of VSYNC signal to rising edge (falling edge)
of HSYNC signal needs enough time (2 machine cycles or more) for
avoiding jitter. The polarity of HSYNC and VSYNC signals can select
with the CRT port control register (address 00EC16).
When bits 0 and 1 of the CRT port control register
(address 00EC16) are set to “1” (negative polarity)
VSYNC signal input
VSYNC control
signal in
microcomputer
0.125 to 0.25 [
s]
( at f(XIN) = 8MHz)
Period of counting
HSYNC signal
(Note 2)
HSYNC
signal input
Not count
12345
Notes 1 : The vertical position is determined by counting falling edge of H SYNC
signal after rising edge of VSYNC control signal in the microcomputer.
2 :Do not generate falling edge of HSYNC signal near rising edge of
VSYNC control signal in microcomputer to avoid jitter.
3 : The pulse width of VSYNC and HSYNC needs 8 machine cycles or
more.
8 machine cycles
or more
8 machine cycles
or more
Fig. 38. Vertical Position Register i
b7 b6 b5 b4 b3 b2 b1 b0
Vertical position register i (CVi) (i = 1 and 2) [Addresses 00E116, 00E216]
B
Name
Functions
After reset
R W
Vertical Position Register i
0
to
6
7
Vertical display start positions
128 steps (0016 to 7F16)
Indeterminate
0
(CVi : CVi0 to CVi6)
Nothing is assigned. This bit is a write disable bit.
When this bit is read out, the value is “0.”
RW
R—
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37225ECSP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M6 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M8 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225MA | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M372429100 | 制造商:ITW Switches 功能描述:IN-RUSH |
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