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参数资料
| 型号： | ST6375B1/XXX |
| 厂商： | STMICROELECTRONICS |
| 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： | SHRINK, PLASTIC, DIP-42 |
| 文件页数： | 51/84页 |
| 文件大小： | 861K |
| 代理商： | ST6375B1/XXX |
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ST6365, ST6375, ST6385 ST6367, ST6377, ST6387
ON-SCREEN DISPLAY (Cont’d)
When modifying the picture display (i.e.: a bar
graph for an analog control), it is important that the
switching on of the GE bit is done before the end
of the flyback time (D in Figure 31). If the GE bit is
set after the end of the flyback time then the OSD
will not start until the beginning of the next frame.
This results in one frame being lost and will result
in a Flicker on the screen. One method to be sure
to avoid the flicker is to wait for the VSYNC inter-
rupt at the start of the flyback; once the VSYNC in-
terrupt is detected, then the GE bit can be set to
zero, the characters changed, and the GE set to
one. All this should occur before the end of the fly-
back time in order not to lose a frame. The correct
edge of the interrupt must be chosen. The VSYNC
pin may alternatively be sampled by software in or-
der to know the status; this can be done by reading
bit 4 of register E4h; this bit is inverted with respect
to the VSYNC pin.
6 - An OSD end of line Bar is present in the
ST638x ROM, EPROM and OTP devices when
using the box background mode.
The bar appears at the end of the line in the back-
ground mode when the last character is a space
character, the first format character is defined with
S=0 (size 0)and the box background is not dis-
played during the space. The bar is the colour of
the background defined by the space character.
To eliminate the bar:
a. If two backgrounds are used then the bar
should be moved off the screen by using large
word spaces instead of character spaces. If
there are not enough spaces before the end of
the line, then the location of the valid characters
should be moved so they appear at the end of
the line (and hence no bar); positioning can be
compensated using the horizontal start register.
b. If only one background is used, then the other
background should be disabled in order to elim-
inate the bar.
7 - The OSD oscillator external network should
consist of a capacitor on each of the OSD oscilla-
tor pins to ground together with an inductance be-
tween pins. The user should select the two capac-
itors to be the same value (15pF to 25pF each is
recommended). The inductance is chosen to give
the desired OSD oscillator frequency for the appli-
cation (typically 56H).
相关PDF资料 |
PDF描述 |
|---|---|
| ST6367B1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6382B1/XXX | 8-BIT, MROM, MICROCONTROLLER, PDIP42 |
| ST6386B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6388B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| ST6387B1 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST6377 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT MCUs WITH ON-SCREEN-DISPLAY FOR TV TUNING |
| ST6377B1/XXX | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| ST63-7-W1-22-9-120 | 制造商:TE Connectivity 功能描述:ST63-7-W1-22-9-120 |
| ST63-7-W1-22-9-120CS28 | 制造商:TE Connectivity 功能描述:E53797N001 |
| ST63-7-W1-22-9-120CS2894 | 制造商:TE Connectivity 功能描述: |
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