參數(shù)資料
型號(hào): TDA938X
廠商: NXP Semiconductors N.V.
英文描述: TV signal processor-Teletext decoder with embedded m-Controller
中文描述: 電視信號(hào)處理器與嵌入式米圖文電視解碼器控制器
文件頁(yè)數(shù): 12/140頁(yè)
文件大?。?/td> 570K
代理商: TDA938X
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Philips Semiconductors
Preliminary specification
1999 Sep 28
12
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA 935X/6X/8X series
Microcontroller
The functionality of the microcontroller used on the device is described here with reference to the industry
standard 80C51 microcontroller. A full description of its functionality can be found in the "80C51 Based 8-Bit
Microcontrollers - Philips Semiconductors (ref. IC20)" (Reference [1])
Memory Organisation
The device has the capability of a maximum of 128K PROGRAM ROM and 12K DATA RAM internally.
ROM B
ANK
S
WITCHING
Devices with up to 64K Program ROM have a continuous address space. Devices with over 64K Program ROM
use ROM bank switching. The 128K version is arranged in four banks of 32K. One of the 32K banks is common
and is always addressable. The other three banks(Bank0,Bank1,Bank2) can be accessed by selecting the right
bank via the SFR ROMBK bits 1/0.
Figure 5 ROM Bank Switching memory map
ROMBK<2:0>
0 to 32K
32K to 64K
00
Common
Bank0
01
Common
Bank1
10
Common
Bank2
11
Reserved
Reserved
Table 2 ROM Bank Selection
7FFFH
0000H
FFFFH
8000H
8000H
8000H
FFFFH
FFFFH
Common
32K
Bank0
32K
Bank2
32K
Bank1
32K
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