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
文件頁數(shù): 14/140頁
文件大?。?/td> 570K
代理商: TDA938X
Philips Semiconductors
Preliminary specification
1999 Sep 28
14
TV signal processor-Teletext decoder with
embedded
μ
-Controller
TDA 935X/6X/8X series
Figure 8 Security bits for production blank devices
RAM O
RGANISATION
The Internal Data RAM is organised into two areas, Data Memory and Special Function Registers (SFR’s) as
shown in Figure 9.
Data Memory
The Data memory is 256 x 8 bits wide (byte) and occupies the address range 00h to 255h when using indirect
addressing and 00h to 127h when using Direct addressing. The SFRs occupy the address range 128 to 255 and
are accessible using Direct addressing only.
Figure 9 Internal Data Memory
The lower 128 Bytes of Data memory are mapped as shown in Figure 10. The lowest 24 bytes are grouped into
4 banks of 8 registers, the next 16 bytes above the register banks form a block of bit addressable memory space.
handbook, full pagewidth
MBK955
PROGRAM ROM
MEMORY
USER ROM PROGRAMMING
(ENABLE/DISABLE)
VERIFY
(ENABLE/DISABLE)
ENABLED
ENABLED
ENABLED
ENABLED
ENABLED
ENABLED
SECURITY BITS SET
CHARACTER ROM
PACKET 26 ROM
Accessible
by Direct
and Indirect
Addressing
Accessible
by Indirect
Addressing
only
Accessible
by Direct
Addressing
only
00H
7FH
80H
FFH
Lower
128
Upper
128
Data Memory
Special Function Registers
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