參數(shù)資料
型號(hào): VCT3801A
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
英文描述: Video/Controller/Teletext IC Family
中文描述: 視頻/控制/圖文電視IC系列
文件頁數(shù): 96/172頁
文件大?。?/td> 2243K
代理商: VCT3801A
VCT 38xxA
ADVANCE INFORMATION
96
Micronas
Fig. 5–6:
Memory Banking shown with the maximal size of addressable memory
5.9. DMA Interface
The DMA interface connects the TPU SRAM interface
to the CPU memory bus (see Fig. 5–7). This is done to
avoid extra pins for external TPU page memory.
The DMA interface must not be operated during CPU
Slow mode. The DMA interface can be disabled via
DMAIM.DMAEN.
As long as the DMA interface is disabled, the TPU can-
not access the CPU address bus and therefore should
not transfer data to/from the internal/external SRAM.
To ensure this, the controller should reset the TPU
before disabling the DMA interface. After reset the
TPU will not access the memory until receiving the I
2
C
command “DRAM_MODE” (see Section 3.12. on
page 68).
B
B
B
B
B
080000H
084000H
B
0A8000H
0F8000H
0A0000H
088000H
CPU RAM/ROM
Text RAM
TPU Address Space
Page
Table
Page
Memory
OSD
Bank
Scratch
int. ROM
TTX
Bank
DMA
ext. RAM
int. RAM
ext. ROM
B
B
B
B
B
000000H
004000H
003000H
002000H
001000H
07FFFFH
000000H
000FFFH
reserved
001E00H
008000H
00FFFFH
002000H
I/O-Reg
078000H
B
Page
Table
000000H
Scratch
001800H
001000H
Page
Memory
OSD&TTX
Bank
004000H
020000H
128kbyte
256kbyte
512kbyte
040000H
16kbyte
19k Text RAM
128k Text RAM
Page
Table
000000H
Scratch
001800H
001000H
Page
Memory
16k Text RAM
003000H
OSD&TTX
Bank
相關(guān)PDF資料
PDF描述
VCU2133 High-Speed coder/decoder IC
VCX2150A Surface mount 15.88 mm SQ (.625 SQ)
VCX2154A Surface mount 15.88 mm SQ (.625 SQ)
VCXO-105N VCXO
VCXO-199 VCXO
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
VCT3802A 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family
VCT3803A 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family
VCT3804A 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family
VCT3811A 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family
VCT3831A 制造商:MICRONAS 制造商全稱:MICRONAS 功能描述:Video/Controller/Teletext IC Family