參數(shù)資料
型號： ST92186B3BK
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP32
封裝： PLASTIC, SDIP-32
文件頁數(shù)： 128/148頁
文件大?。?/td> 1664K
代理商： ST92186B3BK
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ST92186B - OSDRAM CONTROLLER
OSDRAM CONTROLLER (Cont’d)
7.3.3 OSDRAM Controller Reset Configuration
During and after a reset, the OSDRAM access is
disabled.
When the OSDRAM controller is software disa-
bled, it will:
1. Complete the current slot.
2. Complete any pending write operation (a few
slots may elapse).
3. Switch off any OSDRAM interface activity.
7.3.3.1 OSDRAM Controller Running Modes
2 control bits called “OSDE” (OSD Enable) and
“DION” (Display ON) are used to enable the OS-
DRAM controller. Both are also shared by the Dis-
play controller.
These 2 bits are located in the OSDER register.
This register is described in the On Screen Display
Controller Chapter.
7.3.3.2 CPU Slowdown on OSDRAM access
As described above, the OSDRAM controller puts
priority on TV real time constraints and may slow-
down the CPU (through “wait” cycle insertion)
when any OSDRAM access is requested. The ef-
fective duration of the CPU slowdown is a complex
function of the OSDRAM controller working mode
and of the respective PIXCLK frequency (OS-
DRAM frequency) and the Core INTCLK frequen-
cy.
7.3.3.3 OSDRAM Mapping
The OSDRAM is mapped in the memory space,
segment 22h, starting from address 0000h to ad-
dress 00FFh (256 bytes).
The OSDRAM mapping is described in the On
Screen Display Controller Chapter.
相關(guān)PDF資料
PDF描述
ST92195B2T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
ST92195B3B1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP56
ST92195B4B1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PDIP56
ST92195B5T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
ST92195B6T1/XXX 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST92195 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B1B1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
ST92195B1T1 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32-64K ROM HCMOS MCU WITH ON-SCREEN-DISPLAY AND TELETEXT DATA SLICER
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