參數資料
型號： SDA5251-2
廠商： SIEMENS A G
元件分類： 圖文
英文描述： ICs for Consumer Electronics
中文描述： TELETEXT DECODER, PDIP52
文件頁數： 49/143頁
文件大?。?/td> 1050K
代理商： SDA5251-2
SDA 525x
Semiconductor Group
49
1998-04-08
6.3.2
The processor memory is organized into two address spaces. The memory spaces are:
– Program memory address space
– 256 byte plus 128-byte internal data memory address space
– Extended internal data memory (XRAM) for storing teletext and display data.
A 16-bit program counter and a dedicated banking logic provide the processor with its
512-Kbyte addressing capabilities (for ROM-less versions, up to 19 address lines are
available). The program counter allows the user to execute calls and branches to any
location within the program memory space. There are no instructions that permit
program execution to move from the program memory space to any of the data memory
space.
Memory Organization
6.3.2.1
Certain locations in program memory are reserved for specific programs. Locations 0000
through 0002 are reserved for the initialization program. Following reset, the CPU
always begins execution at location 0000. Locations 0003 through 0051 are reserved for
the seven interrupt-request service programs as indicated in
Table 7
.
Program Memory
Depending on the selected type, the user can access a part of the internal/external ROM
for the application software. Please note that another part of the Program Memory is
reserved for the TTX firmware.
Table 7
Source
External Interrupt 0
Timer 0 Overflow
External Interrupt 1
Timer 1 Overflow
Serial Interface
Teletext Sync Signals
Analog Digital Converter
Address
03
11
19
27
35
43
51
(03
H
)
(0B
H
)
(13
H
)
(1B
H
)
(23
H
)
(2B
H
)
(33
H
)
Table 8
Type
SDA 5250
SDA 5251
SDA 5252
SDA 5254
SDA 5255
Available User ROM Space
480
Kbyte
8
Kbyte
16
Kbyte
16
Kbyte
24
Kbyte
externally
internally
internally
internally
internally
相關PDF資料
PDF描述
SDA5256M-2 ICs for Consumer Electronics
SDA5252-2 ICs for Consumer Electronics
SDA5255-2 ICs for Consumer Electronics
SDA5252 8-BIT SINGLE CHIP MICROCONTROLLERS
SDA5252M ICs for Consumer Electronics
相關代理商/技術參數
參數描述
SDA5251M 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5251M-2 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5252 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5252-2 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
SDA5252M 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:ICs for Consumer Electronics
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